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A327675 Number of colored compositions of n using all colors of an initial interval of the color palette such that all parts have different color patterns and the patterns for parts i are sorted and have i colors (in arbitrary order). 2

%I #10 Apr 11 2022 08:36:10

%S 1,1,4,40,355,4425,69521,1162951,22259414,478096938,11614132907,

%T 299700810545,8456607358157,255883964141333,8275199908539114,

%U 287869753459458468,10564476589147507523,409845503129745719513,16777378294629533764699,720626728499888159724831

%N Number of colored compositions of n using all colors of an initial interval of the color palette such that all parts have different color patterns and the patterns for parts i are sorted and have i colors (in arbitrary order).

%H Alois P. Heinz, <a href="/A327675/b327675.txt">Table of n, a(n) for n = 0..200</a>

%p b:= proc(n, i, k, p) option remember;

%p `if`(n=0, p!, `if`(i<1, 0, add(binomial(k^i, j)*

%p b(n-i*j, min(n-i*j, i-1), k, p+j)/j!, j=0..n/i)))

%p end:

%p a:= n-> add(add(b(n$2, i, 0)*(-1)^(k-i)*

%p binomial(k, i), i=0..k), k=0..n):

%p seq(a(n), n=0..23);

%t b[n_, i_, k_, p_] := b[n, i, k, p] =

%t If[n == 0, p!, If[i < 1, 0, Sum[ Binomial[k^i, j]*

%t b[n - i*j, Min[n - i*j, i - 1], k, p + j]/j!, {j, 0, n/i}]]];

%t a[n_] := Sum[Sum[b[n, n, i, 0]*(-1)^(k - i)*

%t Binomial[k, i], {i, 0, k}], {k, 0, n}];

%t Table[a[n], {n, 0, 23}] (* _Jean-François Alcover_, Apr 11 2022, after _Alois P. Heinz_ *)

%Y Row sums of A327673.

%K nonn

%O 0,3

%A _Alois P. Heinz_, Sep 21 2019

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Last modified April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)