A246657 a(n) = round(3F2([1, 3/2, 1 - n], [2, 2], -4)).

0, 1, 3, 7, 24, 87, 332, 1320, 5407, 22672, 96844, 419910, 1843386, 8176962, 36594388, 165026353, 749170529, 3420949803, 15702232962, 72407225094, 335276107549, 1558289108596, 7267201176311, 33996105203757, 159484982985619, 750134031377432

Offset: 0

Author

Peter Luschny, Sep 16 2014

Keywords

• nonn

Comments

Without rounding, the sequence were 1, 5/2, 22/3, 97/4, 436/5, 997/3, 9241/7, 43257/8,... for n>=1. - R. J. Mathar, Jul 27 2022

Crossrefs

Cf. A129164.

Programs

Sage

A246657 = lambda n: hypergeometric([1, 3/2, 1-n], [2, 2], -4)
[round(A246657(n).n(100)) for n in (0..25)]

Formula

a(n) = A129164(n)/n for n>=1.