74221

Appears in sequences

• Square array T(n, k) = Product_{j=1..n} ( Sum_{i=0..j-1} ( (k+1)^7 - Sum_{m=1..5} (k+1)^m )^i ) with T(n, 0) = n!, read by antidiagonals.at n=23A156888
• Number of tilings of a 16 X n rectangle using 2n octominoes of shape I.at n=27A250665
• G.f.: Sum_{n>=0} (n+1)*(n+2)*(n+3)/3! * (x + x^n)^n.at n=40A325999