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 A084026 #6 Aug 23 2014 13:12:43 %S A084026 1,44,171,2772,50405,216612,1036301,21177112,100808001,1000900010, %T A084026 10011211001,210033330012,1000175710001,20001366310002, %U A084026 500000464000005,2110001551000112,10000027672000001,200000187781000002 %N A084026 Diagonal of A084024. %Y A084026 Cf. A084024, A084025, A084027, A084028. %K A084026 base,nonn %O A084026 1,2 %A A084026 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 23 2003 %E A084026 Corrected and extended by _Ray Chandler_, Jun 14 2003