

A154117


Expansion of (1x+3*x^2)/((1x)*(12*x)).


6



1, 2, 7, 17, 37, 77, 157, 317, 637, 1277, 2557, 5117, 10237, 20477, 40957, 81917, 163837, 327677, 655357, 1310717, 2621437, 5242877, 10485757, 20971517, 41943037, 83886077, 167772157, 335544317, 671088637, 1342177277, 2684354557
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OFFSET

0,2


COMMENTS

Binomial transform of 1,1,4,1,4,1,4,1,4,1,4,1,4,1,4,... Philippe Deleham, Jan 05 2009


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index to sequences with linear recurrences with constant coefficients, signature (3,2).


FORMULA

Contribution from Philippe Deléham, Jan 05 2009: (Start)
a(n) = 3*a(n1)2*a(n2), n>2.
a(n) = 2*a(n1)+3, n>1.
a(n) = 5*2^(n1)3, n>=1. (End)


PROG

(MAGMA) [1] cat [5*2^n3 : n in [0..30]]; // Vincenzo Librandi, Nov 11 2011


CROSSREFS

Cf. A094373, A000079, A083329, A095121, A131128, A131130.
Sequence in context: A045380 A086321 A009302 * A173769 A067038 A209398
Adjacent sequences: A154114 A154115 A154116 * A154118 A154119 A154120


KEYWORD

nonn,easy


AUTHOR

Vladimir Joseph Stephan Orlovsky, Dec 15 2008


EXTENSIONS

a(0) added by Philippe Deléham, Jan 05 2009


STATUS

approved



