Column 1 of triangle A128320; a(n) = A128321(n) + 2n*A128321(n-1), where A128321 is column 0 of triangle A128320.

A128322

Column 1 of triangle A128320; a(n) = A128321(n) + 2n*A128321(n-1), where A128321 is column 0 of triangle A128320.

Terms

    a(0) =1a(1) =3a(2) =8a(3) =41a(4) =234a(5) =1602a(6) =11976a(7) =98541a(8) =866942a(9) =8139602a(10) =80559456a(11) =837863578a(12) =9098447188a(13) =102867879636

External references