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%I #4 Feb 16 2016 06:10:16
%S 0,0,0,10,175,1131,4501,13588,34245,75925,152911,285726,502723,841855,
%T 1352625,2098216,3157801,4629033,6630715,9305650,12823671,17384851,
%U 23222893,30608700,39854125,51315901,65399751,82564678,103327435,128267175,158030281,193335376
%N Number of sequences in {1,...,n}^n with longest increasing subsequence of length n-2.
%H Alois P. Heinz, <a href="/A268936/b268936.txt">Table of n, a(n) for n = 0..1000</a>
%F G.f.: x^3*(3*x^6-20*x^5+57*x^4-91*x^3+116*x^2+105*x+10)/(1-x)^7.
%e a(3) = 10: 111, 211, 221, 222, 311, 321, 322, 331, 332, 333.
%e a(4) = 175: 1112, 1113, 1114, 1121, ..., 4414, 4423, 4424, 4434.
%Y A diagonal of A245667.
%K nonn,easy
%O 0,4
%A _Alois P. Heinz_, Feb 16 2016
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