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A084672 G.f.: (1+x^2+2*x^4)/((1-x^3)*(1-x)^2). 0
1, 2, 4, 7, 12, 18, 25, 34, 44, 55, 68, 82, 97, 114, 132, 151, 172, 194, 217, 242, 268, 295, 324, 354, 385, 418, 452, 487, 524, 562, 601, 642, 684, 727, 772, 818, 865, 914, 964, 1015, 1068, 1122, 1177, 1234, 1292, 1351, 1412, 1474, 1537, 1602, 1668, 1735, 1804, 1874 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..53.

J. Hietarinta and C.-M. Viallet, Singularity confinement and degree growth

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

MATHEMATICA

CoefficientList[Series[(1+x^2+2x^4)/((1-x^3)(1-x)^2), {x, 0, 70}], x]  (* Harvey P. Dale, Mar 31 2011 *)

PROG

(PARI) Vec((1+x^2+2*x^4)/(1-x^3)/(1-x)^2+O(x^99)) \\ Charles R Greathouse IV, Sep 10 2014

CROSSREFS

Sequence in context: A346114 A332744 A345731 * A011910 A227590 A267529

Adjacent sequences:  A084669 A084670 A084671 * A084673 A084674 A084675

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 16 2003

STATUS

approved

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Last modified May 18 21:17 EDT 2022. Contains 353824 sequences. (Running on oeis4.)