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Search: id:A019478
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A019478 a(n) = 5*a(n-1) + a(n-2) - 3*a(n-3) (agrees with A019477 only for n <= 23). +0
2
3, 15, 76, 386, 1961, 9963, 50618, 257170, 1306579, 6638211, 33726124, 171349094, 870556961, 4422955527, 22471287314, 114167721214, 580041026803, 2946958993287, 14972332829596, 76068500060858 (list; graph; listen)
OFFSET

0,1

REFERENCES

R. K. Guy, personal communication.

FORMULA

O.g.f.: (3-2x^2)/(1-5x-x^2+3x^3). R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 09 2008

CROSSREFS

Sequence in context: A037759 A037647 A019477 this_sequence A151327 A125700 A037766

Adjacent sequences: A019475 A019476 A019477 this_sequence A019479 A019480 A019481

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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