309458

Appears in sequences

• Triangle T(n, k) = T(n-1, k) + T(n-1, k-1) + ((n+1)*(n+2)/2)*T(n-2, k-1), read by rows.at n=40A154227
• Product_{n>=1} 1 / (1 - a(n)*x^n/n!) = 1 + sin(x).at n=9A353873