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