Row sums of triangle A091039 (scaled second columns of (k,k)-Stirling2 arrays).

A091040

Row sums of triangle A091039 (scaled second columns of (k,k)-Stirling2 arrays).

Terms

    a(0) =1a(1) =4a(2) =16a(3) =98a(4) =1252a(5) =39056a(6) =3235216a(7) =746947664a(8) =504955938112

External references