Sum of multinomials M(n; lambda), where lambda ranges over all partitions of n into parts incorporating 2.

A327828

Sum of multinomials M(n; lambda), where lambda ranges over all partitions of n into parts incorporating 2.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =3a(4) =18a(5) =100a(6) =705a(7) =5166a(8) =44856a(9) =413316a(10) =4297635a(11) =47906650a(12) =586050828a(13) =7669704978a(14) =108433645502

External references