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A203509 Row sums of triangle A178473. 0
1, 2, 4, 548, 9420, 3852, 34864, 19084, 15296, 154560176, 7180221844, 887102780, 211332046788, 71893259484, 20454788424, 5986072942766808, 5988933869570752, 22285488224, 2756032824242080, 17677170921656, 679436626785756, 20936052371230100988 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 17 00:26 EDT 2022. Contains 353724 sequences. (Running on oeis4.)