**Theta series of square lattice (or number of ways of writing n as a sum of 2 squares).**

*1, 4, 4, 0, 4, 8, 0, 0, 4, 4, 8, 0, 0, 8, 0, 0, 4, 8, 4, 0, 8, 0, 0, 0, 0, 12, 8, 0, 0, 8, 0, 0, 4, 0*

*1 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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