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Search: id:A047265
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| A047265 |
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Triangle a(n,k) (n >= 1, 1<=k<=n) giving coefficient of x^n in expansion of {Product_{j=1..inf} (1-x^j) - 1 }^k. |
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+0
2
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| 1, -1, 1, 0, -2, 1, 0, 1, -3, 1, -1, 0, 3, -4, 1, 0, -2, -1, 6, -5, 1, -1, 2, -3, -4, 10, -6, 1, 0, -2, 6, -3, -10, 15, -7, 1, 0, 2, -6, 12, 0, -20, 21, -8, 1, 0, 1, 6, -16, 19, 9, -35, 28, -9, 1, 0, 0, 0, 16, -35, 24, 28, -56, 36, -10, 1, -1, 2, -3, -6, 40
(list; graph; listen)
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OFFSET
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1,5
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REFERENCES
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H. Gupta, On the coefficients of the powers of Dedekind's modular form, J. London Math. Soc., 39 (1964), 433-440.
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EXAMPLE
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1; -1 1; 0 -2 1; 0 1 -3 1;...
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CROSSREFS
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Columns give A010815, A047654, A047655, A001482-A001488, A047649, A001490, A047938-A047648, A006665.
Sequence in context: A077227 A089263 A156135 this_sequence A100995 A129353 A136566
Adjacent sequences: A047262 A047263 A047264 this_sequence A047266 A047267 A047268
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KEYWORD
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sign,easy,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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