Third column (m=3) of triangle A144881 (S1hat(3)).

A144884

Third column (m=3) of triangle A144881 (S1hat(3)).

Terms

    a(0) =1a(1) =3a(2) =21a(3) =123a(4) =792a(5) =5292a(6) =42768a(7) =348840a(8) =3313440a(9) =33734880a(10) =382423680a(11) =4683303360a(12) =62795865600a(13) =903908678400

External references