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A105152
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Number of sum of squares representations of n^2 in n dimensions disregarding order and sign.
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6
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1, 1, 1, 2, 2, 4, 9, 13, 25, 52, 94, 195, 354, 691, 1341, 2514, 4746, 8984, 16639, 31031, 57421, 105091, 192266, 349765, 632223, 1138114, 2043082, 3642712, 6474196, 11462149, 20189285, 35427948, 61987644, 107928280, 187336851, 324080969, 558451251, 959214488
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OFFSET
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0,4
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LINKS
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EXAMPLE
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a(5)=4 since we can write 5^2 as 0^2+0^2+0^2+0^2+5^2, 0^2+0^2+0^2+3^2+4^2, 0^2+1^2+2^2+2^2+4^2, 2^2+2^2+2^2+2^2+3^2.
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MATHEMATICA
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<< NumberTheory`NumberTheoryFunctions`; Table[Length@SumOfSquaresRepresentations[k, k^2], {k, 16}]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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