623700

Appears in sequences

• a(n) = T(2n,n-1), T given by A026648.at n=9A026650
• a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026648.at n=9A026972
• A triangle of numbers related to triangle A049325.at n=39A049410
• A triangle of numbers related to triangle A049325.at n=47A049410
• Triangle, read by rows, where T(n,k) = n!/(k!*(n-4*k)!*4^k) for n>=4*k>=0.at n=26A118933
• Triangle, read by rows, defined by T(n,k) = A000108(n-k)*A001147(k)*C(n,2*k), for k=0..[n/2], n>=0, where A000108 is the Catalan numbers and A001147 is the double factorials.at n=34A125080
• Greatest 6th-power-free divisor of n!.at n=10A248772
• Triangle read by rows, T(n,k) = C(2*n,n+k)*Sum_{m=0..k} (-1)^(m+k)*C(n+k,n+m)* Stirling2(n+m,m), for n>=0 and 0<=k<=n.at n=25A268439
• Irregular triangle (an infinite binary tree) read by rows. The tree has root node 1 in row n = 1. For n > 1, each node with value m in row n-1 has a left child with value m / n if n divides m, and a right child with value m * n.at n=32A360298
• Expansion of e.g.f. 1 / (1 + x * log(1 - x^2/2))^2.at n=10A375237