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 A051852 #3 May 01 2014 02:49:32 %S A051852 1,1,2,1,2,7,1,2,3,8,39,1,2,3,9,10,52,311,1,2,3,4,10,11,19,67,68,467, %T A051852 3268,1,2,3,4,11,12,13,21,84,85,94,669,670,5350,42799,1,2,3,4,5,12,13, %U A051852 14,23,24,103,104,105,114,205,923,924,934,8304,8305,74734,672605,1,2,3 %N A051852 A051851(n)/row_index_of(n). %e A051852 1; 1, 2; 1, 2, 7; 1, 2, 3, 8, 39; 1, 2, 3, 9, 10, 52, 311; %p A051852 with(combinat); rows_upto_u := proc(u) local a,n; a := []; for n from 1 to u do a := [op(a),op(map(divby, sort(map(list_in_base_b,partition(n),(n+1))), n))]; od; RETURN(a); end; %Y A051852 A subset of A051850 (but note the relative indexing...) %K A051852 easy,nonn %O A051852 1,3 %A A051852 _Antti Karttunen_, Dec 13 1999