Sequences

First digit after decimal point of square root of n.

First digit after decimal point of cube root of n.

First digit after decimal point of 4th root of n.

First digit after decimal point of 5th root of n.

First digit after decimal point of 6th root of n.

First digit after decimal point of 7th root of n.

First digit after decimal point of 8th root of n.

First digit after decimal point of 9th root of n.

a(n) = round(sqrt(n)) - floor(sqrt(n)).

First bit in fractional part of binary expansion of cube root of n.

First bit in fractional part of binary expansion of 4th root of n.

First bit in fractional part of binary expansion of 5th root of n.

First bit in fractional part of binary expansion of 6th root of n.

First bit in fractional part of binary expansion of 7th root of n.

First bit in fractional part of binary expansion of 8th root of n.

First bit in fractional part of binary expansion of 9th root of n.

First digit after the decimal point of the n-th root of n.

Sum of exponents in prime-power factorization of multinomial coefficient M(3n; n,n,n).

Sum of exponents in prime-power factorization of multinomial coefficient M(4n; n,n,n,n).

Sum of exponents in prime-power factorization of multinomial coefficient M(4n;2n,n,n).

Sum of exponents in prime-power factorization of multinomial coefficient M(5n; n,n,n,n,n).

Sum of exponents in prime-power factorization of multinomial coefficient M(5n;3n,n,n).

Sum of exponents in prime-power factorization of multinomial coefficient M(5n;2n,2n,n).

Sum of exponents in prime-power factorization of multinomial coefficient M(6n; n,n,n,n,n,n).

Sum of exponents in prime-power factorization of multinomial coefficient M(6n,2n,2n,2n).

Sum of exponents of primes in C(4n,2n) - sum of exponents of primes in C(2n,n).

Sum of exponents of primes in C(5n,3n) - sum of exponents of primes in C(3n,2n).

Duplicate of A023819.

Look and Say sequence: describe the previous term! (method C - initial term is 2).

Sum of exponents of primes in multinomial coefficient M(4n; 2n,n,n) - sum of exponents of primes in M(3n; n,n,n).

Sum of exponents of primes in multinomial coefficient M(3n; n+1,n,n-1).

Sum of exponents of primes in multinomial coefficient M(4n; n+2,2n,n-2).

Sum of exponents of primes in multinomial coefficient M(3n; n+2,n-1,n-1).

Number of isomorphism types of symmetric configurations n_4.

Number of sets S = {a_1, a_2, ..., a_k}, with 1 < a_i < a_j <= n such that no a_j divides the product of all the others.

Triangle of numbers T(n,k), where T(n,k) is the number of sets S = {a_1, a_2, ..., a_k}, with 1 < a_i < a_j <= n such that no a_j divides the product of all the others.

Number of block permutations on an n-set.

Number of block permutations on an n-set which are uniform, i.e., corresponding blocks have same size.

Absolute value of determinant of n X n matrix whose entries are the integers from 1 to n^2 spiraling inward, starting in a corner.

a(n) = 1 - n.

a(n) = 1 - n^3.

a(n) = 1 - n^4.

a(n) = 1 - n^5.

a(n) = 1 - n^6.

a(n) = 1 - n^7.

a(n) = 1 - n^8.

a(n) = 1 - n^9.

a(n) = 1 - n^10.

a(n) = 1 - n^11.

a(n) = 1 - n^12.