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Search: id:A023437
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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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+0
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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REFERENCES
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J. H. E. Cohn, Letter to the editor, Fib. Quart. 2 (1964), 108.
V. E. Hoggatt, Jr. and D. A. Lind, The dying rabbit problem, Fib. Quart. 7 (1969), 482-487.
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FORMULA
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G.f.: x/((x-1)*(1+x)*(x^5+x^3+x-1)). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 27 2009]
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CROSSREFS
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See A000045 for the Fibonacci numbers.
First differences are in A013983.
Sequence in context: A156145 A059923 A055805 this_sequence A013985 A092834 A080106
Adjacent sequences: A023434 A023435 A023436 this_sequence A023438 A023439 A023440
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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