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A188527 a(n) = A188526(n) / 7. 2
4, 35, 313, 2813, 25309, 227765, 2049853, 18448613, 166037389, 1494336245, 13449025693, 121041230213, 1089371069869, 9804339624725, 88239056614333, 794151509512613, 7147363585580749, 64326272270161205, 578936450431319773, 5210428053881615813, 46893852484934018029 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..500

FORMULA

a(n) = (3^(2*n + 3) + 2^n) / 7.

PROG

(MAGMA) [(3^(2*n + 3) + 2^n)/7: n in [0..20]]; // Vincenzo Librandi, Jul 17 2011

CROSSREFS

Sequence in context: A104526 A174436 A145607 * A292190 A026304 A215541

Adjacent sequences:  A188524 A188525 A188526 * A188528 A188529 A188530

KEYWORD

nonn,easy

AUTHOR

Reinhard Zumkeller, Apr 03 2011

STATUS

approved

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Last modified January 28 13:29 EST 2020. Contains 331321 sequences. (Running on oeis4.)