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 A154472 #3 Mar 31 2012 13:21:18 %S A154472 42,218,359,875,1763,2359496,926357642,1431707647759,239418125921492, %T A154472 9138627621456887,5265474933763866437,36640566669911088560059, %U A154472 1544449741807406472977531,12634727265105076809694418 %N A154472 a(n) = A126309(A154471(n)). %C A154472 This sequence essentially gives the iterated S-expressions of the sequence A154471, with ()'s removed. See A154473. %H A154472 A. Karttunen, <a href="/A154472/b154472.txt">Table of n, a(n) for n = 0..100</a> %Y A154472 a(n) = A080300(A154473(n)). %K A154472 nonn %O A154472 0,1 %A A154472 _Antti Karttunen_, Jan 11 2009