A122892 Secondary diagonal of triangle A122890.

1, 10, 70, 424, 2382, 12804, 66946, 343772, 1744314, 8780912, 43976688, 219546976, 1094132461, 5448766458, 27135655714, 135218356264, 674461583180, 3368432133000, 16847360404260, 84396523333080, 423485559461250

Offset

4,2

Comments

The main diagonal of triangle A122890 equals the Catalan numbers (A000108); this is the diagonal immediately below (with leading zeros omitted).

Links

Table of n, a(n) for n=4..24.

Crossrefs

Cf. A122890, A122888; A122887.

Sequence in context: A002802 A101029 A375921 * A125347 A005465 A229702

Adjacent sequences: A122889 A122890 A122891 * A122893 A122894 A122895

Keyword

nonn

Author

Paul D. Hanna, Sep 18 2006

Status

approved