Expansion of Jacobi theta constant (theta_2(2z))^2/4.
1, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 2, 0, 0, 0, 0, 0
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Thu Apr 7 16:25:08 CEST 2011 [seqfan] Re: A008441 Number of ways of writing n as the sum of 2 triangular numbers