OFFSET
2,3
LINKS
Hassan Chamati and Nicholay S. Tonchev, Exact results for some Madelung type constants in the finite-size scaling theory, arXiv:cond-mat/0003235 [cond-mat.stat-mech] (2000).
Eric Weisstein's World of Mathematics, Madelung Constants.
FORMULA
2*gamma(1/4)*zeta(1/2).
EXAMPLE
-10.58935155331315207613722106085351454465270665502975898976765...
MAPLE
evalf(2*GAMMA(1/4)*Zeta(1/2), 120); # Vaclav Kotesovec, May 11 2015
MATHEMATICA
RealDigits[2*Gamma[1/4]*Zeta[1/2], 10, 105] // First
PROG
(PARI) -2*gamma(1/4)*zeta(1/2) \\ Charles R Greathouse IV, May 11 2015
CROSSREFS
KEYWORD
AUTHOR
Jean-François Alcover, May 11 2015
STATUS
approved