OFFSET
2,19
COMMENTS
An almost-integer discovered by Simon Plouffe. The computed sum equals 10 within 15 digits.
LINKS
Simon Plouffe, Simon Plouffe Home Page
Eric Weisstein's MathWorld, Almost Integer
EXAMPLE
10.00000000000000019016176788866267558435930585544533348025489784340610994387...
MATHEMATICA
NSum[n^3/(Exp[2*Pi*n/7] - 1), {n, 1, Infinity}, NSumTerms -> 220, WorkingPrecision -> 100] // RealDigits[#, 10, 100] & // First
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Jean-François Alcover, May 27 2013
EXTENSIONS
Offset corrected by Rick L. Shepherd, Jan 01 2014
STATUS
approved