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A256871 a(n) = 2^(n-1)*(2^n+11). 3
6, 13, 30, 76, 216, 688, 2400, 8896, 34176, 133888, 529920, 2108416, 8411136, 33599488, 134307840, 537051136, 2147844096, 8590655488, 34361180160, 137441837056, 549761581056, 2199034789888, 8796116090880, 35184418226176, 140737580630016, 562950137970688 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

a(A102633(n)) is a subsequence of A141549.

LINKS

Colin Barker, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (6,-8).

FORMULA

G.f.: (6-23*x)/((1-4*x)*(1-2*x)). - Vincenzo Librandi, Apr 24 2015

a(n) = 6*a(n-1)-8*a(n-2). - Colin Barker, Apr 26 2015

MATHEMATICA

Table[2^(n - 1) (2^n + 11), {n, 0, 30}] (* Vincenzo Librandi, Apr 24 2015 *)

PROG

(PARI) A256871(n)=2^(n-1)*(2^n+11)

(MAGMA) [2^(n-1)*(2^n+11): n in [0..30]]; // Vincenzo Librandi, Apr 24 2015

(PARI) Vec((6-23*x)/((1-4*x)*(1-2*x)) + O(x^100)) \\ Colin Barker, Apr 26 2015

CROSSREFS

Sequence in context: A159694 A145976 A101622 * A192304 A147330 A042607

Adjacent sequences:  A256868 A256869 A256870 * A256872 A256873 A256874

KEYWORD

nonn,easy

AUTHOR

M. F. Hasler, Apr 24 2015

STATUS

approved

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Last modified September 28 13:24 EDT 2020. Contains 337393 sequences. (Running on oeis4.)