login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A327676 Total number of colors in all 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 #11 Apr 11 2022 09:13:09

%S 0,1,7,96,1120,17133,318550,6174409,134222746,3227634290,86758393637,

%T 2455321082763,75378081090618,2465367832093301,85698931156186485,

%U 3188667759545387936,124641366048950285559,5131034234304472735967,222142129822095164108159

%N Total number of colors in all 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="/A327676/b327676.txt">Table of n, a(n) for n = 0..200</a>

%F a(n) = Sum_{k=1..n} k * A327673(n,k).

%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(k*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[k*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 Cf. A327673.

%K nonn

%O 0,3

%A _Alois P. Heinz_, Sep 21 2019

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)