A020127 Ceiling of Gamma(n+4/5)/Gamma(4/5).

1, 1, 2, 5, 16, 74, 427, 2901, 22625, 199095, 1951128, 21072176, 248651669, 3182741352, 43921830648, 650043093589, 10270680878694, 172547438762056, 3071344409964595, 57741274907334371, 1143277243165220534, 23780166657836587104, 518407633140837598862, 11819694035611097254054

Offset

0,3

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[4/5, Range[0, 25]]] (* Paolo Xausa, Jan 15 2026 *)

Crossrefs

Cf. A020037, A020082.

Sequence in context: A245881 A078639 A002632 * A179500 A381765 A377569

Adjacent sequences: A020124 A020125 A020126 * A020128 A020129 A020130

Keyword

nonn

Author

Simon Plouffe

Extensions

More terms from Paolo Xausa, Jan 15 2026

Status

approved