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Search: id:A144477
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| A144477 |
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The numerators of A061037 extended to some negative principal quantum numbers. |
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+0
5
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| 0, -3, -1, -3, 0, 5, 3, 21, 2, 45, 15, 77, 6, 117, 35, 165, 12, 221, 63, 285, 20, 357, 99, 437, 30, 525, 143, 621, 42, 725, 195, 837, 56, 957, 255, 1085
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OFFSET
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1,2
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COMMENT
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The formula numerator(1/4-1/n^2) is applied as in A061037, in addition applied to n=1 (which yields 3).
The case n=0 is skipped. The values for n=-1 and n=-2 are prepended.
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FORMULA
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a(n)=A061037(n-3), n>4. a(3-n)=a(3+n).
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CROSSREFS
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Sequence in context: A073747 A127549 A082648 this_sequence A079530 A020815 A156872
Adjacent sequences: A144474 A144475 A144476 this_sequence A144478 A144479 A144480
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KEYWORD
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sign,less
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Oct 11 2008
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EXTENSIONS
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Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 08 2008
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