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 A240125 #13 Apr 05 2014 22:25:46 %S A240125 0,0,0,3,5,138,201,13032,19990,4095612,7026883,4451051502 %N A240125 Number of inequivalent ways to cut an n X n square into squares with integer sides, such that the dissection has one reflective symmetry in an axis parallel to a side, but no other symmetries. %H A240125 Ed Wynn, <a href="http://arxiv.org/abs/1308.5420">Exhaustive generation of Mrs Perkins's quilt square dissections for low orders</a>, arXiv:1308.5420 %e A240125 The three dissections for n=4, with the axis horizontal: %e A240125 --------- --------- --------- %e A240125 | | | | | | | | | | | | | %e A240125 | ----- | ----- --------- %e A240125 | | | | | | | | | | | %e A240125 --------- ----- | | ----- %e A240125 | | | | | | | | | | | %e A240125 | ----- | ----- --------- %e A240125 | | | | | | | | | | | | | %e A240125 --------- --------- --------- %Y A240125 Cf. A226980, A045846, A224239, A240123, A240124. %K A240125 nonn,more %O A240125 1,4 %A A240125 _Ed Wynn_, Apr 01 2014