A371501 - OEIS

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A371501

Decimal expansion of Sum_{k>=0} 1 / (k^2 - k)!.

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

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

OFFSET

1,1

LINKS

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

FORMULA

(this constant) - (constant in A371500) = 2.00277777777777777859984130244...

Equals 1+ A370013. - R. J. Mathar, Apr 14 2024

EXAMPLE

2.501388890976564588086730549...

MATHEMATICA

s[x_] := s[x] = Sum[x^n/((n^2 - n)!), {n, 0, Infinity}]