91665

Appears in sequences

• a(n) = (n-1)*(n+2)*(2*n+11)/2.at n=42A130862
• a(0) = a(1) = 1. a(n) = a(n-1) + a(n - b(n)), where b(n) is largest prime dividing n.at n=45A137809
• a(n) = (n+1)!! mod n!!.at n=14A227415
• a(n) = (2n+1)!! mod (2n)!! where k!! = A006882(k).at n=6A306184
• Expansion of 1/2 * Product_{i>=0, j>=0, k>=0} (1 + x^(i^2 + j^2 + k^2)).at n=26A321381
• Number of vertices of even degree in a cubic lattice n X n X n.at n=46A383585
• Odd numbers k such that gcd(A276086(sigma(k)-k), A276086(k)) is equal to A276086(k), where A276086 is the primorial base exp-function, and sigma is the sum of divisors function.at n=42A388267
• Triangle read by rows: T(n,k) is the number of sets of noncrossing paths of size k that cover n nodes arranged in a circle with one node paths allowed, 0 <= k <= n.at n=61A390894