A383953 - OEIS

A383953

a(0) = 4, a(n) = 2*a(n-1) + (-1)^n.

4, 7, 15, 29, 59, 117, 235, 469, 939, 1877, 3755, 7509, 15019, 30037, 60075, 120149, 240299, 480597, 961195, 1922389, 3844779, 7689557, 15379115, 30758229, 61516459, 123032917, 246065835, 492131669, 984263339, 1968526677, 3937053355, 7874106709, 15748213419, 31496426837

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OFFSET

0,1

LINKS

Table of n, a(n) for n=0..33.

Index entries for linear recurrences with constant coefficients, signature (1,2).

FORMULA

a(n) = (11*2^n + (-1)^n)/3.

a(n) = A340627(n+1)/2.

a(n) = 2*A052997(n) + 1 for n >= 1.

a(n) = 11*A001045(n) + (-1)^n*4.

a(n) = a(n-4) + 55*2^(n-4) for n >= 4.