

A020720


Pisot sequences E(7,9), P(7,9).


10



7, 9, 12, 16, 21, 28, 37, 49, 65, 86, 114, 151, 200, 265, 351, 465, 616, 816, 1081, 1432, 1897, 2513, 3329, 4410, 5842, 7739, 10252, 13581, 17991, 23833, 31572, 41824, 55405, 73396, 97229, 128801, 170625, 226030, 299426, 396655, 525456, 696081, 922111, 1221537
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OFFSET

0,1


LINKS



FORMULA

a(n) = a(n2) + a(n3) for n>=3. (Proved using the PtoRv program of EkhadSloaneZeilberger.)  N. J. A. Sloane, Sep 09 2016
G.f.: (7+9*x+5*x^2) / (1x^2x^3).  Colin Barker, Jun 05 2016


MATHEMATICA

CoefficientList[Series[(7 + 9 x + 5 x^2)/(1  x^2  x^3), {x, 0, 50}], x] (* Stefano Spezia, Aug 31 2018 *)


CROSSREFS

See A008776 for definitions of Pisot sequences.


KEYWORD

nonn


AUTHOR



STATUS

approved



