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 A083941 #10 Jan 29 2024 11:23:29 %S A083941 0,2,50,844,906,13624,13876,14642,14892,15402,218352,219368,222436, %T A083941 223448,225492,234722,235730,238796,239800,241844,246986,247986, %U A083941 250028,254122,3494880,3498960,3511240,3515312,3523496,3560388,3564452,3576728 %N A083941 A014486-encoding of symmetric binary trees. %H A083941 Antti Karttunen, <a href="/A014486/a014486.ps.gz">Ten initial terms illustrated in positions 0, 1, 6, 43, 51, 389, 416, 477, 504, 551</a> %H A083941 <a href="/index/Ro#RootedTreePlanEncodings">Index entries for encodings of plane rooted trees</a> %F A083941 a(n) = A014486(A083940(n)). %Y A083941 Subsets: A084107, A080263, A080293. %K A083941 nonn %O A083941 0,2 %A A083941 _Antti Karttunen_, May 13 2003