Second unsigned column of triangle A051523.

A051564

Second unsigned column of triangle A051523.

Terms

    a(0) =0a(1) =1a(2) =21a(3) =362a(4) =6026a(5) =101524a(6) =1763100a(7) =31813200a(8) =598482000a(9) =11752855200a(10) =240947474400

External references