Sequences

a(n) = (3*n+4)*(n+3)!/24.

Number of simplices in barycentric subdivision of n-simplex.

Number of simplices in barycentric subdivision of n-simplex.

Number of simplices in barycentric subdivision of n-simplex.

Number of simplices in barycentric subdivision of n-simplex.

Number of n-dimensional hypotheses allowing for conditional independence.

5 X 5 stochastic matrices of integers.

6 X 6 stochastic matrices of integers.

a(n) = 1 + a(floor(n/2))*a(ceiling(n/2)).

a(n) = 1 + a(floor(n/2))*a(ceiling(n/2)) for n > 1, a(1) = 2.

Number of unlabeled planar simple graphs with n nodes.

Primes of the form m^2 + 3m + 9, where m can be positive or negative.

Class numbers of Shanks' simplest cubic fields.

Primes of form k^2 + 4.

Class numbers of the real quadratic fields Q(sqrt(A005473(n))).

a(n) = n*(5*n+1)/2.

a(n) = n*(5*n - 1)/2.

a(n) = 2^(n-1)*(2^n - 1)*Product_{j=1..n-1} (2^j + 1).

Prime Fibonacci numbers.

Prime Lucas numbers (cf. A000032).

Decimal expansion of cube root of 4.

Decimal expansion of cube root of 5.

Decimal expansion of cube root of 7.

Continued fraction for cube root of 7.

Numerators of continued fraction convergents to cube root of 7.

Denominators of continued fraction convergents to cube root of 7.

Decimal expansion of cube root of 6.

Starts 0, 4 and contains no 3-term arithmetic progression.

Maximal number of edges in a b^{hat} graceful graph with n nodes.

Number of nonzero coefficients of order n in Baker-Campbell-Hausdorff expansion.

Number of partitions of [n] where the first k elements are marked (0 <= k <= n-1) and at least k blocks contain their own index.

a(n) = n^3 + 3*n + 1.

From expansion of falling factorials.

2-Bell numbers: a(n) = number of partitions of [n+1] with a distinguished block.

3-Bell numbers: E.g.f.: exp(3*z + exp(z) - 1).

Number of triangulations of the disk G_{n,3}.

A finite sequence associated with the Lie algebra E_7.

Erroneous version of A210696.

Triangulations of the disk G_{2,n}.

Triangulations of the disk G_{3,n}.

Number of unrooted triangulations of a quadrilateral with n internal nodes.

Number of unrooted triangulations of a pentagon with n internal nodes.

Number of unrooted triangulations of a hexagon with n internal nodes.

Number of unrooted triangulations of a disk with one internal node and n+3 nodes on the boundary.

Number of unrooted triangulations of a disk with 2 internal nodes and n+3 nodes on the boundary.

Number of unrooted triangulations with reflection symmetry of a quadrilateral with n internal nodes.

Number of unrooted triangulations with reflection symmetry of a pentagon with n internal nodes.

Number of unrooted triangulations with reflection symmetry of a hexagon with n internal nodes.

Number of unrooted triangulations with reflection symmetry of a disk with one internal node and n+3 nodes on the boundary.

Number of unrooted triangulations with reflection symmetry of a disk with 2 internal nodes and n+3 nodes on the boundary.