This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A185579 #21 Mar 11 2018 05:58:41
%S A185579 1,5,4,0,1,7,0,9,0,1,8,5,5,5,4,3,6,1,7,4,3,6,4,6,6,6,6,3,8,6,4,8,0,3,
%T A185579 9,7,8,4,2,9,6,2,7,5,6,4,1,5,6,1,4,5,9,4,8,4,2,1,8,9,5,5,2,9,4,6,0,3,
%U A185579 7,9,1,5,8,7,6,0,1,2,7,6,9,7,9,2,0,7,4,3,0,7,6,9,2,2,7,8,9,1,3,0,2,5,3,8,5
%N A185579 Decimal expansion of Sum_{m,n,p = -infinity..infinity} (-1)^m/sqrt(m^2 + (n-1/2)^2 + (p-1/2)^2).
%H A185579 I. J. Zucker, <a href="https://dx.doi.org/10.1088/0305-4470/8/11/008">Madelung constants and lattice sums for invariant cubic lattice complexes and certain tetragonal structures</a>, J. Phys. A: Math. Gen. 8 (11) (1975) 1734, variable e(1).
%H A185579 I. J. Zucker, <a href="http://dx.doi.org/10.1088/0305-4470/9/4/006">Functional equations for poly-dimensional zeta functions and the evaluation of Madelung constants</a>, J. Phys. A: Math. Gen. 9 (4) (1976) 499, variable e(1).
%F A185579 Equals 2*log(1+sqrt(2)) + 4*Sum_{n>=1, p>=1} (-1)^n*cosech(d*Pi)/d where d = sqrt(n^2 + (p-1/2)^2).
%e A185579 1.5401709018555436174364666638648...
%t A185579 digits = 105; Clear[f]; f[n_, p_] := f[n, p] = (d = Sqrt[n^2 + (p - 1/2)^2]; (-1)^n*(Csch[d*Pi]/d) // N[#, digits+10]&); f[m_] := f[m] = 2*Log[1 + Sqrt[2]] + 4*Sum[f[n, p], {n, 1, m}, {p, 1, m}] // RealDigits[#, 10, digits+10]& // First; f[0]; f[m = 10]; While[f[m] != f[m-10], Print[m]; m = m+10]; f[m][[1 ;; digits]] (* _Jean-François Alcover_, Feb 21 2013 *)
%Y A185579 Cf. A185576, A185577, A185578, A185580, A185581, A185582, A185583.
%K A185579 cons,nonn
%O A185579 1,2
%A A185579 _R. J. Mathar_, Jan 31 2011
%E A185579 More terms from _Jean-François Alcover_, Feb 21 2013