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

Author

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

Keywords

• nonn

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).

Crossrefs

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