A020121 Ceiling of Gamma(n+4/7)/Gamma(4/7).

1, 1, 1, 3, 9, 38, 211, 1381, 10451, 89575, 857352, 9063435, 104876888, 1318452296, 17893281148, 260730668151, 4059948975491, 67279154450986, 1182190856781604, 21954973054515490, 429690186924088871, 8839340988152685339, 190677212744436498025, 4303857087660138098279

Offset

0,4

Links

Paolo Xausa, Table of n, a(n) for n = 0..400

Maple

Digits := 64:f := proc(n, x) ceil(GAMMA(n+x)/GAMMA(x)); end;

Mathematica

Ceiling[Pochhammer[4/7, Range[0, 25]]] (* Paolo Xausa, Jan 15 2026 *)

Crossrefs

Cf. A020031, A020076, A220609.

Sequence in context: A030846 A030818 A225960 * A270593 A059804 A065657

Adjacent sequences: A020118 A020119 A020120 * A020122 A020123 A020124

Keyword

nonn

Author

Simon Plouffe

Extensions

More terms from Paolo Xausa, Jan 15 2026

Status

approved