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A084683 G.f.: (1+2*x^3+2*x^6)/((1-x)*(1-x-x^2+x^3-x^4-x^5+x^6)). 0
1, 2, 4, 8, 14, 24, 40, 65, 104, 164, 258, 404, 632, 986, 1537, 2394, 3728, 5804, 9034, 14060, 21880, 34049, 52984, 82448, 128294, 199632, 310636, 483362, 752129, 1170338, 1821084, 2833664, 4409270, 6860960, 10675864, 16611969, 25848728, 40221404, 62585722, 97385276 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..39.

J. Hietarinta and C.-M. Viallet, Discrete Painleve I and ..., Chaos, Solitons and Fractals 11, 2000, p. 29.

Index entries for linear recurrences with constant coefficients, signature (2,0,-2,2,0,-2,1).

CROSSREFS

Cf. A064864.

Sequence in context: A015128 A208605 A123655 * A271493 A118544 A222037

Adjacent sequences:  A084680 A084681 A084682 * A084684 A084685 A084686

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 16 2003

STATUS

approved

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Last modified September 26 15:27 EDT 2017. Contains 292531 sequences.