A238055 - OEIS

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A238055

a(n) = (13*3^n-1)/2.

6, 19, 58, 175, 526, 1579, 4738, 14215, 42646, 127939, 383818, 1151455, 3454366, 10363099, 31089298, 93267895, 279803686, 839411059, 2518233178, 7554699535, 22664098606, 67992295819, 203976887458, 611930662375, 1835791987126, 5507375961379, 16522127884138

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,1

LINKS

Table of n, a(n) for n=0..26.

Index entries for linear recurrences with constant coefficients, signature (4,-3).

FORMULA

a(n) = 3*a(n-1) + 1, a(0)=6.

a(n) = 4*a(n-1) - 3*a(n-2), a(0)=6, a(1)=19.

a(n) = 2*A237930(n) - A003462(n).

a(n) = A052909(n+1) + A000244(n).

a(n) = A237930(n) + A000244(n+1).