A322508 Factorial expansion of Gamma(1/3) = Sum_{n>=1} a(n)/n!.

2, 1, 1, 0, 1, 2, 5, 6, 7, 2, 1, 8, 5, 7, 9, 12, 13, 10, 10, 13, 17, 18, 5, 1, 6, 3, 26, 13, 20, 29, 8, 31, 27, 19, 21, 27, 5, 14, 12, 3, 9, 37, 34, 40, 14, 29, 35, 12, 27, 4, 36, 22, 24, 11, 31, 37, 12, 5, 47, 14, 22, 18, 51, 20, 51, 4, 15, 54, 61, 26, 55, 2, 6, 73, 7, 17, 66, 54, 27

Offset

1,1

Links

Table of n, a(n) for n=1..79.

Index entries for factorial base representation

Example

Gamma(1/3) = 2 + 1/2! + 1/3! + 0/4! + 1/5! + 2/6! + 5/7! + 6/8! + ...

Mathematica

With[{b = Gamma[1/3]}, Table[If[n==1, Floor[b], Floor[n!*b] - n*Floor[(n-1)!*b]], {n, 1, 100}]]

Prog

(PARI) default(realprecision, 250); b = gamma(1/3); for(n=1, 80, print1(if(n==1, floor(b), floor(n!*b) - n*floor((n-1)!*b)), ", "))
(Magma) SetDefaultRealField(RealField(250));  [Floor(Gamma(1/3))] cat [Floor(Factorial(n)*Gamma(1/3)) - n*Floor(Factorial((n-1))*Gamma(1/3)) : n in [2..80]];
(SageMath)
b=gamma(1/3);
def a(n):
    if (n==1): return floor(b)
    else: return expand(floor(factorial(n)*b) -n*floor(factorial(n-1)*b))
[a(n) for n in (1..80)]

Crossrefs

Cf. A073005 (decimal expansion), A030651 (continued fraction).

Cf. A068463 (Gamma(3/4)), A068464 (Gamma(1/4)), A322509 (Gamma(2/3)).

Sequence in context: A294509 A059571 A027052 * A194438 A144409 A131257

Adjacent sequences: A322505 A322506 A322507 * A322509 A322510 A322511

Keyword

nonn

Author

G. C. Greubel, Dec 12 2018

Status

approved