Sequences

Triangular array in which k-th entry in n-th row is C([ (n+k)/2 ],k) (1<=k<=n).

Number of distributive lattices; also number of paths with n turns when light is reflected from 8 glass plates.

Number of distributive lattices; also number of paths with n turns when light is reflected from 9 glass plates.

Number of distributive lattices; also number of paths with n turns when light is reflected from 10 glass plates.

Number of distributive lattices; also number of paths with n turns when light is reflected from 11 glass plates.

Number of distributive lattices; also number of paths with n turns when light is reflected from 12 glass plates.

Number of triangles a queen can make (starting anywhere) on an n X n board.

a(0) = 1, a(1) = 1, a(n) = a(n-1) - a(n-2) + n.

a(n) = a(n-1) + a(n-2) + n, a(0) = a(1) = 1.

Spontaneous magnetization coefficients for square lattice spin 3/2 Ising model.

Spontaneous magnetization coefficients for square lattice spin 5/2 Ising model.

Specific heat coefficients for square lattice spin 3 Ising model.

Most likely total for a roll of n 6-sided dice, choosing the smallest if there is a choice.

Complement (and also first differences) of Hofstadter's sequence A005228.

Decimal expansion of Lehmer's constant.

Schur's numbers (version 1).

Term at which n-Somos sequence first becomes nonintegral.

Number of Steiner triple systems (STS's) on n elements.

Number of nonisomorphic Steiner triple systems (STS's) S(2,3,n) on n points.

Binary expansion contains a single 0.

Site percolation series for hexagonal net.

Digital root of Fibonacci(n).

a(n+1) is the sum of digits of (a(n) + a(n-1)).

a(n)^2 has last digit equal to the sum of the other digits.

Number of pentagonal n-ominoes on the dodecahedron.

Number of triangular n-ominoes on the icosahedron.

Number of one-sided pentagonal n-ominoes (or pentominoes) on the dodecahedron.

Number of one-sided triangular n-ominoes (or triominoes) on the icosahedron.

a(n+1) = sum of digits of (a(n) + a(n-1)).

The nonsquares squared.

Numbers in which parity of the decimal digits alternates.

Odd numbers in which parity of digits alternates.

Even numbers in which parity of digits alternates.

Primes in which parity of digits alternates.

Primes such that in p^2 the parity of digits alternates.

Squares-of-primes in which no two adjacent digits have the same parity.

Palindromes in which parity of digits alternates.

Odd palindromes in which parity of digits alternates.

Even palindromes in which parity of digits alternates.

Palindromic primes in which parity of digits alternates.

Numbers k such that in k^2 the parity of digits alternates.

Squares in which parity of digits alternates.

Numbers k such that in k and k^2 the parity of digits alternates.

Squares such that in n and sqrt(n) the parity of digits alternates.

Odd n such that in n^2 the parity of digits alternates.

Odd squares in which parity of digits alternates.

Even numbers k such that in k^2 the parity of digits alternates.

Even squares in which parity of digits alternates.

Numbers n such that in n^3 the parity of digits alternates.

Cubes in which parity of digits alternates.