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A198771 (11*5^n-1)/2. 1
5, 27, 137, 687, 3437, 17187, 85937, 429687, 2148437, 10742187, 53710937, 268554687, 1342773437, 6713867187, 33569335937, 167846679687, 839233398437, 4196166992187, 20980834960937, 104904174804687, 524520874023437, 2622604370117187 (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 (6,-5).

FORMULA

a(n) = 5*a(n-1)+2. a(n) = 6*a(n-1)-5*a(n-2), n>1.

G.f. ( 5-3*x ) / ( (5*x-1)*(x-1) ). - R. J. Mathar, Oct 30 2011

PROG

(MAGMA) [(11*5^n-1)/2: n in [0..30]]

CROSSREFS

Sequence in context: A009027 A275540 A037498 * A084177 A037675 A221673

Adjacent sequences:  A198768 A198769 A198770 * A198772 A198773 A198774

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Oct 30 2011

STATUS

approved

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Last modified April 17 16:12 EDT 2021. Contains 343063 sequences. (Running on oeis4.)