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 A218777 #6 Nov 17 2012 23:48:12 %S A218777 1,3,6,15,39,117,359,1149,3780,12752,43740,152346,536655,1909411, %T A218777 6852153,24772328,90137210,329838392,1213048022,4481262944, %U A218777 16621500330,61875433940,231099456721,865736972546,3252139562356,12247622197965,46232602224402,174897265479074 %N A218777 A014486-indices for the Beanstalk-tree growing one natural number at time, starting from the tree of one internal node (1), with the "lesser numbers to the left hand side" construction. %C A218777 See comments and examples at A218776. %H A218777 Antti Karttunen, <a href="/A218777/b218777.txt">Table of n, a(n) for n = 1..128</a> %F A218777 a(n) = A080300(A218776(n)). %Y A218777 a(n) = A057163(A218779(n)). Cf. A218787, A218776, A218781, A218783. %K A218777 nonn %O A218777 1,2 %A A218777 _Antti Karttunen_, Nov 17 2012