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A020083 a(n) = floor( Gamma(n + 3/5)/Gamma(3/5) ). 5
1, 0, 0, 2, 8, 41, 231, 1527, 11610, 99850, 958561, 10160755, 117864768, 1485096081, 20197306708, 294880677941, 4600138575887, 76362300359740, 1343976486331425, 24997962645764522, 489960067856984638 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..449

MAPLE

Digits:= 64: x:=3/5: f:= proc(n, x) trunc(GAMMA(n+x)/GAMMA(x)); end;

seq(floor(pochhammer(3/5, n)), n = 0..25); # G. C. Greubel, Nov 17 2019

MATHEMATICA

Floor[Pochhammer[3/5, Range[0, 25]]] (* G. C. Greubel, Nov 19 2018 *)

PROG

(PARI) vector(26, n, my(x=3/5); gamma(n-1+x)\gamma(x) ) \\ G. C. Greubel, Nov 19 2018

(MAGMA) [Truncate(Gamma(n + 3/5)/Gamma(3/5)): n in [0..30]]; // G. C. Greubel, Nov 19 2018

(Sage) [int(gamma(n + 3/5)/gamma(3/5))  for n in range(30)] # G. C. Greubel, Nov 19 2018

CROSSREFS

Cf. A020038, A020128.

Cf. A020082, A020084, A020085.

Sequence in context: A254399 A337753 A060436 * A333093 A217362 A294084

Adjacent sequences:  A020080 A020081 A020082 * A020084 A020085 A020086

KEYWORD

nonn

AUTHOR

Simon Plouffe

STATUS

approved

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Last modified September 23 09:03 EDT 2020. Contains 337298 sequences. (Running on oeis4.)