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 A262874 #10 Oct 10 2015 12:48:13 %S A262874 1,4,7,8,9,11,12,12,13,16,19,20,21,22,22,22,24,29,32,32,33,34,34,34, %T A262874 36,40,43,45,48,49,49,50,52,55,56,56,58,61,62,62,63,64,65,67,70,71,71, %U A262874 72,72,74,76,77,80,82,82,82,82,83,84,85,86,86,86,87,89,92,94,94,96,97,97 %N A262874 Expansion of (Sum_{i>=0} x^(i^2)) * (Sum_{j>=0} x^(j^3)) * (Sum_{k>=0} x^(k^4)) / (1-x). %C A262874 a(n) is number of nonnegative integer solutions (x,x,z,u) such that x + y^2 + z^3 + u^4 = n. %F A262874 G.f.: (Sum_{i>=0} x^(i^2)) * (Sum_{j>=0} x^(j^3)) * (Sum_{k>=0} x^(k^4)) / (1-x). %Y A262874 Cf. A003059, A262872. %K A262874 nonn %O A262874 0,2 %A A262874 _Ran Pan_, Oct 03 2015