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 A239099 #11 Mar 24 2014 00:37:21 %S A239099 1,1,21,671,180323,20898423,7426362705,1874409465055 %N A239099 Erroneous version of A006934. %C A239099 Listed in accordance with the OEIS policy of including published but erroneous sequences, so that users will be directed to the correct versions. %D A239099 Y. L. Luke, The Special Functions and their Approximation, Vol. 1, Academic Press, NY, 1969, see p. 36. %D A239099 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %K A239099 dead %O A239099 0,3