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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.
2

%I #8 Nov 01 2014 23:26:43

%S 1,1,5,420,40350,19369350,9212531290,13126885205000,17810026933803520,

%T 55560479543584645500,164686892656273830526336,

%U 953018107457232657556038400

%N 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 Cf. A147681.

%Y Column k=3 of A215561.

%K nonn

%O 0,3

%A _R. H. Hardin_, May 01 2009

%E a(0), a(11) from _Alois P. Heinz_, Nov 01 2014