56040

Appears in sequences

• Average of row n of A082259.at n=32A082262
• Expansion of e.g.f. exp(5*x)*(BesselI(0,2*x) - BesselI(1,2*x)).at n=7A104455
• Triangle T(n,k), 0 <= k <= n, read by rows defined by: T(0,0)=1, T(n,k)=0 if k < 0 or if k > n, T(n,0) = 4*T(n-1,0) + T(n-1,1), T(n,k) = T(n-1,k-1) + 5*T(n-1,k) + T(n-1,k+1) for k >= 1.at n=28A126331
• a(n) = 8000*n + 40.at n=6A157663
• Riordan array (f(x), x*f(x)) where f(x) is the g.f. of A104455.at n=28A171589
• Numbers k such that in a rotated-square spiral with positive integers (A215468) among k's eight nearest neighbors five or more are primes.at n=22A215471
• A(n, k) is the n-th binomial transform of the Catalan sequence (A000108) evaluated at k. Array read by descending antidiagonals for n >= 0 and k >= 0.at n=58A271025
• a(n) is the sum of quadratic nonresidues of A002145(n) (the n-th prime == 3 mod 4).at n=45A282036
• Let p = n-th prime == 3 mod 8; a(n) = sum of quadratic nonresidues mod p .at n=22A282726
• T(n,k) = number of linear arrays of n 1's, n -1's, and k 0's such that no two adjacent elements are equal.at n=61A283613
• Number of regions in an equilateral triangle "frame" of size n.at n=17A328526