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A116449
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Number of partitions of n into an equal number of prime and composite parts.
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2
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0, 0, 0, 0, 0, 1, 1, 1, 2, 1, 4, 3, 4, 4, 6, 6, 11, 11, 13, 17, 20, 26, 32, 37, 43, 55, 63, 81, 92, 111, 126, 159, 183, 225, 259, 307, 357, 430, 497, 589, 683, 797, 929, 1093, 1270, 1478, 1712, 1979, 2303, 2665, 3086, 3556, 4102, 4716, 5444, 6256, 7194, 8243, 9456, 10824
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,9
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COMMENTS
| a(n) = A002865(n) - A116450(n).
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EXAMPLE
| a(14) = #{2+2*2*3, (2+2)+(2*3+2*2), 5+3*3, (3+3)+(2*2+2*2)} =
4;
a(15) = #{3+2*2*3, 5+2*5, (2+3)+(2*2+2*3), 7+2*2*2,
(2+5)+(2*2+2*2), 11+2*2} = 6.
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CROSSREFS
| Sequence in context: A105239 A130973 A093779 * A071046 A144334 A141210
Adjacent sequences: A116446 A116447 A116448 * A116450 A116451 A116452
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KEYWORD
| nonn
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AUTHOR
| Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 16 2006
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