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A033768 Product t2(q^d); d | 9, where t2 = theta2(q)/(2*q^(1/4)). 2

%I #12 May 29 2017 09:10:36

%S 1,1,0,2,1,0,2,0,0,3,3,0,3,2,0,4,0,0,4,4,0,3,1,0,5,0,0,3,5,0,6,3,0,7,

%T 0,0,4,5,0,5,4,0,4,0,0,8,5,0,6,1,0,5,0,0,7,7,0,6,5,0,7,0,0,8,7,0,7,4,

%U 0,5,0,0,8,9,0,10,0,0,9,0,0,4,7,0,7,6,0,7

%N Product t2(q^d); d | 9, where t2 = theta2(q)/(2*q^(1/4)).

%C Also the number of positive odd solutions to equation a^2 + 3*b^2 + 9*c^2 = 8*n + 13. - _Seiichi Manyama_, May 29 2017

%H Seiichi Manyama, <a href="/A033768/b033768.txt">Table of n, a(n) for n = 0..10000</a>

%K nonn

%O 0,4

%A _N. J. A. Sloane_

%E More terms from _Seiichi Manyama_, May 22 2017

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Last modified April 25 11:29 EDT 2024. Contains 371967 sequences. (Running on oeis4.)