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 A268871 #4 Feb 15 2016 14:07:50
%S A268871 1,96,4501,161876,5179791,157279903,4678809652,138712471261,
%T A268871 4137680201304,124857897038252,3823102196348462,118974270767513360,
%U A268871 3765555655525713427,121224440332571253975,3968401901135750428284,132031213465208461376221,4461459275271493097987384
%N A268871 Number of sequences in {1,...,n}^n with longest increasing subsequence of length four.
%H A268871 Alois P. Heinz, <a href="/A268871/b268871.txt">Table of n, a(n) for n = 4..50</a>
%Y A268871 Column k=4 of A245667.
%K A268871 nonn
%O A268871 4,2
%A A268871 _Alois P. Heinz_, Feb 15 2016