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 A218904 #16 Dec 17 2012 11:46:12 %S A218904 1,2,5,12,21,40,65,108,170,264,392,590,847,1222,1720,2418,3323,4574, %T A218904 6180,8350,11124,14790,19443,25532,33186,43052,55418,71170,90769, %U A218904 115542,146164,184520,231743,290396,362245,450950,559035,691624,852583,1048870,1286109 %N A218904 Sum of the sizes of the kernels of all integer partitions of n. %C A218904 The kernel of an integer partition is the intersection of its Ferrers diagram and of the Ferrers diagram of its conjugate. It includes the Durfee square, which is the largest square fitting into the kernel. %H A218904 Alois P. Heinz, <a href="/A218904/b218904.txt">Table of n, a(n) for n = 1..70</a> %Y A218904 Row sums of A218905. %K A218904 nonn %O A218904 1,2 %A A218904 _Olivier Gérard_, Nov 08 2012 %E A218904 Extended beyond a(20) by _Alois P. Heinz_, Nov 08 2012