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 A281155 #4 Jan 16 2017 14:19:14
%S A281155 0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,3,0,0,0,0,3,0,3,0,0,1,0,6,0,0,0,3,
%T A281155 3,0,3,0,6,0,0,3,0,3,3,6,0,0,1,6,6,0,0,0,6,0,6,6,0,3,0,6,6,0,0,6,3,3,
%U A281155 3,6,6,0,3,0,6,1,3,12,6,0,0,6,3,6,6,0,3,0,3,15,6,0,0,6,12,0,3,3,6,6,0,12,3,0,6,6
%N A281155 Expansion of (Sum_{k>=2} x^(k^2))^3.
%C A281155 Number of ways to write n as an ordered sum of 3 squares > 1.
%H A281155 <a href="/index/Su#ssq">Index entries for sequences related to sums of squares</a>
%F A281155 G.f.: (Sum_{k>=2} x^(k^2))^3.
%F A281155 G.f.: (1/8)*(-1 - 2*x + theta_3(0,x))^3, where theta_3 is the 3rd Jacobi theta function.
%e A281155 G.f. = x^12 + 3*x^17 + 3*x^22 + 3*x^24 + x^27 + 6*x^29 + 3*x^33 + 3*x^34 + 3*x^36 + ...
%e A281155 a(17) = 3 because we have [9, 4, 4], [4, 9, 4] and [4, 4, 9].
%t A281155 nmax = 105; CoefficientList[Series[Sum[x^k^2, {k, 2, nmax}]^3, {x, 0, nmax}], x]
%t A281155 CoefficientList[Series[(-1 - 2 x + EllipticTheta[3, 0, x])^3/8, {x, 0, 105}], x]
%Y A281155 Cf. A000290, A005875, A002102, A006456, A063691, A078134, A280542.
%K A281155 nonn
%O A281155 0,18
%A A281155 _Ilya Gutkovskiy_, Jan 16 2017