A203509 Row sums of triangle A178473.

1, 2, 4, 548, 9420, 3852, 34864, 19084, 15296, 154560176, 7180221844, 887102780, 211332046788, 71893259484, 20454788424, 5986072942766808, 5988933869570752, 22285488224, 2756032824242080, 17677170921656, 679436626785756, 20936052371230100988

Offset

0,2

Comments

Conjecture. If prime p==1 (mod 4), then a((p-1)/4)==2 (mod p); if prime p==3 (mod 4), then a((p-1)/2)==2 (mod p).

Links

Table of n, a(n) for n=0..21.

Crossrefs

Cf. A202941, A202917, A203269, A203278, A203484, A178473, A203498.

Sequence in context: A122808 A294225 A225841 * A009562 A045647 A219452

Adjacent sequences: A203506 A203507 A203508 * A203510 A203511 A203512

Keyword

nonn

Author

Vladimir Shevelev and Peter J. C. Moses, Jan 02 2012

Status

approved