200940

Appears in sequences

• a(n) = A000129(n) * A000129(n+1)/2.at n=8A084158
• Pellonomial triangle P(k,n) read by rows.at n=47A099927
• Pellonomial triangle P(k,n) read by rows.at n=52A099927
• Duplicate of A099927.at n=47A139332
• Duplicate of A099927.at n=52A139332
• Second beta integer combination triangle of a Narayana type: a=2:f(n, a) = a*f(n - 1, a) + f(n - 2, a);c(n,a)=If[n == 0, 1, Product[f(i, a), {i, 1, n}]];w(n,m,q)=c(n - 1, q)*c(n, q)/(c(m - 1, q)*c(n - m, q)*c(m - 1, q)*c(n - m + 1, q)*f(m, q)).at n=37A172377
• Triangle T(n,k), n >= 0, 0 <= k <= n, read by rows, where T(n,k) = (-1)^floor((k+1)/2) * A099927(n,k).at n=52A383715