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 A279298 #4 Dec 09 2016 15:50:14 %S A279298 1,22,8417,279850,18342412,685212762,29029313611,1061113063498, %T A279298 39275632545209,1393699927780248,49383101195522106, %U A279298 1732429335364441968,60909095747242747307,2146854079671345945398,76207802610167861527865,2728392333397142478341958 %N A279298 Number of permutations of [n] having exactly nine (possibly overlapping) doubledescents. %H A279298 Alois P. Heinz, <a href="/A279298/b279298.txt">Table of n, a(n) for n = 11..459</a> %Y A279298 Column k=9 of A162975. %K A279298 nonn %O A279298 11,2 %A A279298 _Alois P. Heinz_, Dec 09 2016