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Number of partitions of n into 8 squares.
5

%I #19 Aug 19 2020 15:44:47

%S 1,1,1,1,2,2,2,2,3,3,3,3,3,4,4,3,5,5,5,5,6,6,7,6,6,8,8,7,8,10,9,9,10,

%T 9,11,10,11,13,14,11,13,14,13,14,14,16,17,15,14,18,18,16,19,21,23,20,

%U 21,20,23,22,19,26,26,23,25,26,26,27,27,28,34,29,28,31,33,30,32,36,35,36,34,36

%N Number of partitions of n into 8 squares.

%H Alois P. Heinz, <a href="/A025423/b025423.txt">Table of n, a(n) for n = 0..10000</a>

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

%p `if`(i<1 or t<1, 0, b(n, i-1, t)+

%p `if`(i^2>n, 0, b(n-i^2, i, t-1))))

%p end:

%p a:= n-> b(n, isqrt(n), 8):

%p seq(a(n), n=0..120); # _Alois P. Heinz_, May 30 2014

%t b[n_, i_, t_] := b[n, i, t] = If[n == 0, 1, If[i<1 || t<1, 0, b[n, i-1, t] + If[i^2 > n, 0, b[n-i^2, i, t-1]]]]; a[n_] := b[n, Sqrt[n] // Floor, 8]; Table[a[n], {n, 0, 120}] (* _Jean-François Alcover_, Jun 11 2015, after _Alois P. Heinz_ *)

%K nonn

%O 0,5

%A _David W. Wilson_