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A023437
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Dying rabbits: a(n) = a(n-1) + a(n-2) - a(n-7).
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2
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0, 1, 1, 2, 3, 5, 8, 13, 20, 32, 50, 79, 124, 195, 306, 481, 755, 1186, 1862, 2924, 4591, 7209, 11319, 17773, 27906, 43817, 68799, 108025, 169615, 266321, 418163, 656578, 1030924, 1618703, 2541602, 3990690
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OFFSET
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0,4
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LINKS
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FORMULA
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G.f.: x/((x-1)*(1+x)*(x^5+x^3+x-1)). [R. J. Mathar, Jul 27 2009]
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MATHEMATICA
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LinearRecurrence[{1, 1, 0, 0, 0, 0, -1}, {0, 1, 1, 2, 3, 5, 8}, 40] (* Harvey P. Dale, Nov 06 2013 *)
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CROSSREFS
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See A000045 for the Fibonacci numbers.
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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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