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A253211 a(n) = 8^n + 7. 2
8, 15, 71, 519, 4103, 32775, 262151, 2097159, 16777223, 134217735, 1073741831, 8589934599, 68719476743, 549755813895, 4398046511111, 35184372088839, 281474976710663, 2251799813685255, 18014398509481991, 144115188075855879, 1152921504606846983 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Subsequence of A226825.

LINKS

Table of n, a(n) for n=0..20.

Index entries for linear recurrences with constant coefficients, signature (9,-8).

FORMULA

G.f.: (8 - 57*x)/((1 - x)*(1 - 8*x)).

a(n) = 9*a(n-1) - 8*a(n-2) for n>1.

MATHEMATICA

Table[8^n + 7, {n, 0, 40}]

PROG

(MAGMA) [8^n+7: n in [0..30]];

CROSSREFS

Cf. similar sequences listed in A253208.

Cf. A164786, A226825.

Sequence in context: A185038 A193490 A015442 * A275246 A177199 A177165

Adjacent sequences:  A253208 A253209 A253210 * A253212 A253213 A253214

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 30 2014

STATUS

approved

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Last modified December 15 22:02 EST 2019. Contains 330012 sequences. (Running on oeis4.)