A147684 - cp's OEIS frontend

A147684 Late-growing permutations: number of permutations of 3 indistinguishable copies of 1..n with every partial sum <= the same partial sum averaged over all permutations.

%I A147684 #8 Nov 01 2014 23:26:43
%S A147684 1,1,5,420,40350,19369350,9212531290,13126885205000,17810026933803520,
%T A147684 55560479543584645500,164686892656273830526336,
%U A147684 953018107457232657556038400
%N A147684 Late-growing permutations: number of permutations of 3 indistinguishable copies of 1..n with every partial sum <= the same partial sum averaged over all permutations.
%Y A147684 Cf. A147681.
%Y A147684 Column k=3 of A215561.
%K A147684 nonn
%O A147684 0,3
%A A147684 _R. H. Hardin_, May 01 2009
%E A147684 a(0), a(11) from _Alois P. Heinz_, Nov 01 2014

cp's OEIS Frontend

A147684 Late-growing permutations: number of permutations of 3 indistinguishable copies of 1..n with every partial sum <= the same partial sum averaged over all permutations.