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A242475 a(n) = 2^n + 8. 3
9, 10, 12, 16, 24, 40, 72, 136, 264, 520, 1032, 2056, 4104, 8200, 16392, 32776, 65544, 131080, 262152, 524296, 1048584, 2097160, 4194312, 8388616, 16777224, 33554440, 67108872, 134217736, 268435464, 536870920, 1073741832 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

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

FORMULA

G.f.: (9-17*x)/((1-x)*(1-2*x)).

a(n) = 2*a(n-1) - 8 = 3*a(n-1) - 2*a(n-2).

a(n) = A052548(n)+6 = A140504(n)+4 = A153972(n)+2.

MATHEMATICA

Table[2^n + 8, {n, 0, 40}] (* or *) CoefficientList[Series[(9 - 17 x)/((1 - x) (1 - 2 x)), {x, 0, 30}], x]

PROG

(MAGMA) [2^n+8: n in [0..40]];

CROSSREFS

Cf. A000051, A052548, A062709, A140504, A168614, A153972, A168415, A188165.

Sequence in context: A342146 A048592 A190665 * A160947 A158581 A343258

Adjacent sequences:  A242472 A242473 A242474 * A242476 A242477 A242478

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, May 20 2014

STATUS

approved

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Last modified June 14 18:06 EDT 2021. Contains 345037 sequences. (Running on oeis4.)