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A217702 Decimal expansion of sum(n>=0, 1/(1+n!)). 1
1, 5, 2, 6, 0, 6, 8, 1, 3, 4, 4, 7, 3, 3, 3, 0, 8, 2, 4, 7, 7, 8, 0, 4, 7, 2, 2, 5, 1, 6, 2, 4, 3, 8, 4, 0, 5, 4, 4, 9, 7, 5, 4, 2, 4, 0, 4, 6, 6, 4, 6, 5, 6, 5, 0, 7, 5, 8, 3, 6, 5, 6, 5, 1, 6, 7, 9, 5, 7, 4, 7, 1, 1, 4, 7, 2, 0, 2, 5, 2, 3, 8, 8, 0, 1, 8, 1, 6, 0, 9, 7, 3, 1, 1, 7, 7, 3, 6, 3, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Is there any known closed form for this sum?

LINKS

Table of n, a(n) for n=1..100.

EXAMPLE

1.526068134473330824778047225162438405449754240466465650758365651679...

MATHEMATICA

digits = 100; NSum[1/(1 + n!), {n, 0, Infinity}, NSumTerms -> digits, WorkingPrecision -> digits+5] // RealDigits[#, 10, digits]& // First

CROSSREFS

Sequence in context: A253382 A253384 A175557 * A018247 A152025 A021099

Adjacent sequences:  A217699 A217700 A217701 * A217703 A217704 A217705

KEYWORD

nonn,cons

AUTHOR

Jean-Fran├žois Alcover, Mar 20 2013

STATUS

approved

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Last modified November 14 23:27 EST 2018. Contains 317221 sequences. (Running on oeis4.)