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 A133105 #13 Mar 09 2015 01:21:29 %S A133105 1,0,1,0,21,266,2843,55932,884756,13816633,283194588,5375499165, %T A133105 125889124371,3202887665805,80542392920980,2270543992935431, %U A133105 64253268814048352,1892633465941308859,59116753827795287519,1886846993941912938452 %N A133105 Number of partitions of n^4 into n distinct nonzero squares. %H A133105 Robert Gerbicz, May 09 2008, <a href="/A133105/b133105.txt">Table of n, a(n) for n = 1..20</a> %e A133105 a(3)=1 because there is exactly one way to express 3^4 as the sum of 3 distinct nonzero squares: 81 = 1^2 + 4^2 + 8^2. %o A133105 (PARI) a(i, n, k)=local(s, j); if(k==1, if(issquare(n) && n<i^2, return(1), return(0)), s=0; for(j=ceil(sqrt(n/k)), min(i-1, floor(sqrt(n-k+1))), s+=a(j, n-j^2, k-1)); return(s)) for(n=1,50, m=n^4; k=n; print1(a(m+1, m, k)", ") ) \\ Herman Jamke (hermanjamke(AT)fastmail.fm), Dec 16 2007 %Y A133105 Cf. A000161, A000378, A000141, A005875, A000118, A000132, A008451. %Y A133105 Cf. A133104 (number of ways to express n^4 as a sum of n nonzero squares), A133102 (number of ways to express n^3 as a sum of n distinct nonzero squares). %K A133105 nonn %O A133105 1,5 %A A133105 _Hugo Pfoertner_, Sep 12 2007 %E A133105 a(10) from Herman Jamke (hermanjamke(AT)fastmail.fm), Dec 16 2007 %E A133105 a(11) onwards from _Robert Gerbicz_, May 09 2008