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A068032
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Number of subsets of {1,2,3,...,n} that sum to 0 mod 11.
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1
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1, 1, 1, 1, 1, 3, 6, 12, 24, 47, 94, 188, 374, 746, 1490, 2978, 5958, 11916, 23832, 47664, 95326, 190652, 381304, 762604, 1525204, 3050404, 6100804, 12201612, 24403224, 48806448, 97612896, 195225788, 390451576, 780903152, 1561806296
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OFFSET
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0,6
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LINKS
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FORMULA
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Empirical G.f.: -(2*x^11+x^9-x^5+x^4+x^3+x^2+x-1) / ((2*x-1)*(2*x^11-1)). [Colin Barker, Dec 22 2012]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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