69356

Appears in sequences

• a(n) = (6*n^4 + 30*n^3 - 20*n^2 + 14)*n/30 + (n mod 2).at n=12A064837
• a(n) = Sum_{i=1..n} i^2*t(i), where t = A000217.at n=13A086689
• a(n) = Sum_{j=0..n} Sum_{k=0..n} binomial(n,j)*binomial(n,k)*max(j,k).at n=7A100511
• Number of walks within N^2 (the first quadrant of Z^2) starting and ending at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 0), (0, -1), (1, 1)}.at n=13A151353
• Number of strings of numbers x(i=1..6) in 0..n with sum i^4*x(i) equal to 1296*n.at n=37A184352
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=50A287040
• Given the associative array U(n,k) described below, numbers m > 5 such that [m-3..m+3] are not in U(n,k) (excluding the first row and column).at n=19A345473