login
A371500
Decimal expansion of Sum_{k>=0} (-1)^k / (k^2 - k)!.
1
4, 9, 8, 6, 1, 1, 1, 1, 3, 1, 9, 8, 7, 8, 6, 8, 0, 9, 4, 8, 6, 8, 8, 9, 2, 4, 6, 7, 0, 0, 9, 0, 7, 4, 2, 7, 3, 7, 1, 0, 8, 4, 0, 9, 6, 4, 2, 7, 4, 8, 2, 5, 8, 0, 2, 8, 4, 4, 0, 3, 2, 4, 3, 0, 6, 9, 2, 1, 4, 1, 0, 9, 7, 4, 4, 6, 9, 4, 9, 4, 5, 7, 5, 7, 7, 2
OFFSET
0,1
FORMULA
(constant in A371501) - (this constant) = 2.00277777777777777859984130244...
EXAMPLE
0.498611113198786809486889246701...
MATHEMATICA
s[x_] := s[x] = Sum[x^n/((n^2 - n)!), {n, 0, Infinity}]
First[RealDigits[N[s[-1], 100]]]
CROSSREFS
Cf. A371501.
Sequence in context: A199203 A370565 A370567 * A197580 A081382 A188658
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Apr 04 2024
STATUS
approved