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 A136834 #4 Oct 10 2012 04:10:24 %S A136834 1,18,2180,2200776,20355006224,1801272981919008, %T A136834 1560858753560238398528,13428038397958481723104394368, %U A136834 1157111379933346772804754279450353920,1004777133003025735713513459537724394989392384 %N A136834 Number of dimer arrangements on (2n-1) X (2n-1) square with exactly one monomer. %D A136834 Y. Kong, Packing dimers on (2p+1) X (2q+1) lattices, Phys. Rev. E 73 (2006) 016106 %Y A136834 Cf. A004003. %K A136834 nonn %O A136834 1,2 %A A136834 _Steven Finch_, Apr 03 2008