A135920

Sequences linked to this entry ?

• A269945: Triangle read by rows. Stirling set numbers of order 2, T(n, n) = 1, T(n, k) = 0 if k < 0 or k > n, otherwise T(n, k) = T(n-1, k-1) + k^2*T(n-1, k), f… match row sums
  1 · 0, 1 · 0, 1, 1 · 0, 1, 5, 1 … Σ 1, 1, 2, 7, 37, 264, 2433, 27913, …
  (−∞, 0]nonnegative
• A008957: Triangle of central factorial numbers T(2*n,2*n-2*k), k >= 0, n >= 1 (in Riordan's notation). match row sums
  1 · 1, 1 · 1, 5, 1 · 1, 14, 21, 1 … Σ 1, 2, 7, 37, 264, 2433, 27913, 386906, …
  (−∞, 0]nonnegative
• A036969: Triangle read by rows: T(n,k) = T(n-1,k-1) + k^2*T(n-1,k), 1 < k <= n, T(n,1) = 1. match row sums
  1 · 1, 1 · 1, 5, 1 · 1, 21, 14, 1 … Σ 1, 2, 7, 37, 264, 2433, 27913, 386906, …
  (−∞, 0]nonnegative