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A368041
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a(n) is the least number k such that k^2 can be written as the difference of two positive squares in exactly n ways.
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2
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1, 3, 8, 16, 12, 64, 128, 24, 512, 1024, 48, 4096, 72, 60, 32768, 65536, 192, 144, 524288, 384, 2097152, 4194304, 120, 16777216, 432, 1536, 134217728, 576, 3072, 1073741824, 2147483648, 240, 1152, 17179869184, 12288, 68719476736, 137438953472, 360, 1728, 1099511627776
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OFFSET
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0,2
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COMMENTS
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Index of first occurrence of n in A046079.
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LINKS
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FORMULA
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EXAMPLE
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a(2) = 8: 8^2 = 10^2 - 6^2 = 17^2 - 15^2.
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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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