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A109698
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Number of partitions of n into parts each equal to 2 mod 5.
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0
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1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 2, 1, 3, 1, 3, 2, 3, 3, 3, 4, 4, 4, 6, 4, 7, 5, 8, 7, 8, 9, 9, 10, 12, 11, 15, 12, 17, 15, 18, 19, 20, 22, 24, 24, 29, 26, 34, 31, 37, 38, 40, 44, 46, 49, 55, 53, 64, 60, 71, 71, 77, 83, 86, 93, 100, 101, 116, 112, 130, 129, 142, 149, 156, 168, 177
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,13
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FORMULA
| G.f.= 1/product(1-x^(2+5j), j=0..infinity). - Emeric Deutsch (deutsch(AT)duke.poly.edu), Feb 15 2006
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EXAMPLE
| a(12)=2 since 12 = 12 = 2+2+2+2+2+2
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MAPLE
| g:=1/product(1-x^(2+5*i), i=0..20): gser:=series(g, x=0, 86): seq(coeff(gser, x, n), n=0..82); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Feb 15 2006
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CROSSREFS
| Sequence in context: A032741 A046051 A025812 * A029231 A025808 A144079
Adjacent sequences: A109695 A109696 A109697 * A109699 A109700 A109701
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KEYWORD
| hard,nonn
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AUTHOR
| Erich Friedman (efriedma(AT)stetson.edu), Aug 07 2005
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EXTENSIONS
| More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Feb 15 2006
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