A126158 Secondary diagonal of symmetric triangle A126155: a(n) = A126155(n+1,n).

1, 35, 1195, 63365, 5126905, 594825635, 93900238195, 19371302880965, 5061231946045105, 1633629246059544035, 638388562675692767995, 297033561831219312442565, 162266449500902451982091305

Offset: 0

Author

Paul D. Hanna, Dec 20 2006

Keywords

• nonn

Crossrefs

Cf. A126155; A126156 (column 0), A126157 (main diagonal).

Formula

a(n)=A126157(n+1)-4*A126157(n). - Philippe Deléham, Jul 22 2007