38960

Appears in sequences

• Number of 4-covers of an unlabeled n-set.at n=9A005784
• 1/24 the number of colorings of a 4 X 4 octagonal array with n colors.at n=1A068251
• n-th derivative of (x^x)^x at x=1.at n=8A215524
• A(n,k) is the n-th derivative of f_k at x=1, and f_k is the k-th of all functions that are representable as x^x^...^x with m>=1 x's and parentheses inserted in all possible ways; square array A(n,k), n>=0, k>=1, read by antidiagonals.at n=63A215703
• Eighth derivative of f_n at x=1, where f_n is the n-th of all functions that are representable as x^x^...^x with m>=1 x's and parentheses inserted in all possible ways.at n=2A215838
• a(n) = cpg(n, 3) + cpg(n, 4) + ... + cpg(n, n) where cpg(n, m) is the m-th n-th-order centered polygonal number.at n=22A257051
• Numbers n such that n and n+1 both have 20 divisors.at n=5A274361
• Triangle read by rows, coefficients of polynomials in t = log(x) of the n-th derivative of x^(x^2), evaluated at x = 1. T(n, k) with n >= 0 and 0 <= k <= n.at n=36A293473
• Expansion of (theta_3(z)*theta_3(23z) + theta_2(z)*theta_2(23z))^5.at n=22A328093
• Numbers k such that both k and k+1 are not exponentially squarefree numbers.at n=29A342188
• Expansion of (1+3*x+2*x^2) / (1-4*x^2-2*x^3).at n=13A384599