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 A279292 #7 Dec 11 2016 11:49:38 %S A279292 1,10,167,2064,28143,374166,5227491,75105984,1127851278,17625022976, %T A279292 287569327286,4891520843344,86749331150517,1602239541108282, %U A279292 30795187124606301,615261376037422992,12764913390565572333,274721686459213597782,6126847681304067647287 %N A279292 Number of permutations of [n] having exactly three (possibly overlapping) doubledescents. %H A279292 Alois P. Heinz, <a href="/A279292/b279292.txt">Table of n, a(n) for n = 5..462</a> %F A279292 a(n) ~ c * 3^(3*n/2) * n^(n+7/2) / (exp(n) * 2^n * Pi^n), where c = 0.0065517603957816327489026... . - _Vaclav Kotesovec_, Dec 11 2016 %Y A279292 Column k=3 of A162975. %K A279292 nonn %O A279292 5,2 %A A279292 _Alois P. Heinz_, Dec 09 2016