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A320795 Number of multisets of exactly ten partitions of positive integers into distinct parts with total sum of parts equal to n. 2

%I #4 Oct 21 2018 09:45:28

%S 1,1,3,5,11,19,37,63,115,195,339,565,954,1565,2580,4174,6751,10775,

%T 17161,27051,42510,66261,102900,158746,243955,372778,567443,859492,

%U 1296958,1948458,2916636,4348377,6460535,9563222,14109242,20744995,30405638,44422190

%N Number of multisets of exactly ten partitions of positive integers into distinct parts with total sum of parts equal to n.

%H Alois P. Heinz, <a href="/A320795/b320795.txt">Table of n, a(n) for n = 10..1000</a>

%F a(n) = [x^n y^10] Product_{j>=1} 1/(1-y*x^j)^A000009(j).

%p g:= proc(n) option remember; `if`(n=0, 1, add(add(`if`(d::odd,

%p d, 0), d=numtheory[divisors](j))*g(n-j), j=1..n)/n)

%p end:

%p b:= proc(n, i) option remember; series(`if`(n=0, 1, `if`(i<1, 0,

%p add(b(n-i*j, i-1)*x^j*binomial(g(i)+j-1, j), j=0..n/i))), x, 11)

%p end:

%p a:= n-> coeff(b(n$2), x, 10):

%p seq(a(n), n=10..60);

%Y Column k=10 of A285229.

%Y Cf. A000009.

%K nonn

%O 10,3

%A _Alois P. Heinz_, Oct 21 2018

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Last modified April 23 13:41 EDT 2024. Contains 371914 sequences. (Running on oeis4.)