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A185346 a(n) = 2^n - 9. 8
-8, -7, -5, -1, 7, 23, 55, 119, 247, 503, 1015, 2039, 4087, 8183, 16375, 32759, 65527, 131063, 262135, 524279, 1048567, 2097143, 4194295, 8388599, 16777207, 33554423, 67108855, 134217719, 268435447, 536870903, 1073741815, 2147483639, 4294967287, 8589934583 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (3,-2).

FORMULA

G.f.: ( -8+17*x ) / ( (2*x-1)*(x-1) ). - R. J. Mathar, Dec 17 2012

E.g.f.: exp(2*x) - 9*exp(x). - G. C. Greubel, Jun 28 2017

MAPLE

A185346:=n->2^n-9: seq(A185346(n), n=0..50); # Wesley Ivan Hurt, Jun 28 2017

MATHEMATICA

Table[2^n - 9, {n, 0, 40}] (* T. D. Noe, Dec 04 2012 *)

PROG

(PARI) a(n)=2^n-9 \\ Charles R Greathouse IV, Oct 07 2015

CROSSREFS

Cf. A000225, A036563, A172252 (essentially the same).

Sequence in context: A167222 A076417 A114137 * A200017 A316728 A231098

Adjacent sequences:  A185343 A185344 A185345 * A185347 A185348 A185349

KEYWORD

sign,easy

AUTHOR

Andreas Rieber, Dec 04 2012

STATUS

approved

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Last modified June 13 20:25 EDT 2021. Contains 345009 sequences. (Running on oeis4.)