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A061260
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G.f.: Product_{k=1..infinity} (1-y*x^k)^(-numbpart(k)), where numbpart(k)=number of partitions of k, cf. A000041.
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2
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1, 2, 1, 3, 2, 1, 5, 6, 2, 1, 7, 11, 6, 2, 1, 11, 23, 15, 6, 2, 1, 15, 40, 32, 15, 6, 2, 1, 22, 73, 67, 37, 15, 6, 2, 1, 30, 120, 134, 79, 37, 15, 6, 2, 1, 42, 202, 255, 172, 85, 37, 15, 6, 2, 1, 56, 320, 470, 348, 187, 85, 37, 15, 6, 2, 1, 77, 511, 848, 697, 397, 194, 85, 37, 15, 6
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| [1], [2, 1], [3, 2, 1], [5, 6, 2, 1], [7, 11, 6, 2, 1], [11, 23, 15, 6, 2, 1], [15, 40, 32, 15, 6, 2, 1], ...
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CROSSREFS
| Row sums: A001970, first column: A000041, A061261.
Sequence in context: A104446 A131345 A134423 * A152097 A119442 A064861
Adjacent sequences: A061257 A061258 A061259 * A061261 A061262 A061263
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KEYWORD
| easy,nonn,tabl
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AUTHOR
| Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 23 2001
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