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A206372 14*4^n - 1. 0
13, 55, 223, 895, 3583, 14335, 57343, 229375, 917503, 3670015, 14680063, 58720255, 234881023, 939524095, 3758096383, 15032385535, 60129542143, 240518168575, 962072674303, 3848290697215, 15393162788863, 61572651155455, 246290604621823, 985162418487295 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..23.

FORMULA

a(n) = 14*4^n - 1.

a(n) = (A199207(n+1) -3)/2 for n>=0.

PROG

(MAGMA) [14*4^n-1 : n in [0..30]];

(PARI) a(n)=14*4^n - 1 \\ Charles R Greathouse IV, May 05 2014

CROSSREFS

Cf. A199207.

Sequence in context: A158485 A005902 A051798 * A061161 A212053 A210290

Adjacent sequences:  A206369 A206370 A206371 * A206373 A206374 A206375

KEYWORD

nonn,easy

AUTHOR

Brad Clardy, Feb 07 2012

STATUS

approved

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Last modified August 29 02:15 EDT 2015. Contains 261184 sequences.