A372773 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A372773

Decimal expansion of Sum_{k>=0} (2*k + 1)!/(3*k + 1)!.

1, 2, 7, 5, 2, 5, 8, 6, 4, 7, 9, 4, 7, 9, 0, 9, 1, 2, 3, 2, 8, 8, 9, 1, 9, 1, 6, 6, 8, 9, 4, 9, 5, 4, 1, 9, 7, 6, 2, 7, 5, 5, 0, 5, 7, 1, 0, 7, 0, 0, 7, 0, 6, 2, 0, 8, 2, 0, 9, 3, 2, 2, 7, 7, 4, 2, 3, 7, 7, 3, 2, 9, 4, 4, 8, 7, 1, 7, 6, 1, 3, 5, 7, 4, 4, 0

(list; constant; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..86.

FORMULA

Equals hypergeom([1, 3/2], [2/3, 4/3], 4/27).

EXAMPLE

1.275258647947909123288919166894954197...

MATHEMATICA

s = Sum[(2 k + 1)!/(3 k + 1)!, {k, 0, Infinity}]

d = N[s, 100]