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A238632 Number of partitions of 5^n into parts that are at most 5. 2

%I #6 Mar 01 2014 19:08:05

%S 1,7,377,106852,55567352,33432635477,20735819929227,12940003469288602,

%T 8085018247233663602,5052825953808096554227,3157977415776418319210477,

%U 1973731034215692844676632352,1233581290054852867292137569852,770988230493054044846859764522977

%N Number of partitions of 5^n into parts that are at most 5.

%H Alois P. Heinz, <a href="/A238632/b238632.txt">Table of n, a(n) for n = 0..350</a>

%F a(n) = [x^(5^n)] Product_{j=1..5} 1/(1-x^j).

%F G.f.: (1953125*x^5+4828125*x^4-2015125*x^3+96440*x^2-774*x+1) / Product_{j=0..4} 1-5^j*x.

%p gf:= (1953125*x^5+4828125*x^4-2015125*x^3+96440*x^2-774*x+1)/mul(1-5^j*x, j=0..4):

%p a:= n-> coeff(series(gf, x, n+1), x, n):

%p seq(a(n), n=0..20);

%Y Row n=5 of A238016.

%K nonn

%O 0,2

%A _Alois P. Heinz_, Mar 01 2014

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Last modified April 24 14:23 EDT 2024. Contains 371960 sequences. (Running on oeis4.)