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 A279299 #4 Dec 09 2016 15:52:35 %S A279299 1,24,16654,607995,52687209,2225347678,112136485958,4652156989635, %T A279299 196794669764694,7848158942463262,311532163358831142, %U A279299 12142236428089109402,472096448836605015907,18301483090810860748890,711486425957970444213722,27780774432495984165279729 %N A279299 Number of permutations of [n] having exactly ten (possibly overlapping) doubledescents. %H A279299 Alois P. Heinz, <a href="/A279299/b279299.txt">Table of n, a(n) for n = 12..459</a> %Y A279299 Column k=10 of A162975. %K A279299 nonn %O A279299 12,2 %A A279299 _Alois P. Heinz_, Dec 09 2016