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A178512 Reversed decimal expansions of A178510. 2
1, 121, 14521, 1742521, 209102521, 25092302521, 3011076302521, 361329156302521, 43359498756302521, 5203139850756302521, 624376782090756302521, 74925213850890756302521, 8991025662106890756302521, 1078923079452826890756302521, 129470769534339226890756302521 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Related to backward decimal expansion of fraction 1/119 and Pell numbers.  [How? - Joerg Arndt, May 14 2011]

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..150

Index entries for linear recurrences with constant coefficients, signature (121,-120).

FORMULA

a(n) = 120*a(n-1) + 1.

a(n) = (1/119)*(120^n-1), with n >= 1. - Paolo P. Lava, Jun 10 2010

From Colin Barker, Oct 02 2015: (Start)

a(n) = 121*a(n-1) - 120*a(n-2) for n > 2.

G.f.: x / ((x-1)*(120*x-1)).

(End)

PROG

(MAGMA) [(1/119)*(120^n-1): n in [1..20]]; // Vincenzo Librandi, May 17 2011

(PARI) Vec(x/((x-1)*(120*x-1)) + O(x^20)) \\ Colin Barker, Oct 02 2015

CROSSREFS

Cf. A000129, A021083, A038207, A178510, A178511.

Sequence in context: A178510 A066625 A078277 * A050740 A121013 A287728

Adjacent sequences:  A178509 A178510 A178511 * A178513 A178514 A178515

KEYWORD

nonn,base,easy

AUTHOR

Mark Dols, May 29 2010

STATUS

approved

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Last modified October 19 14:21 EDT 2018. Contains 316362 sequences. (Running on oeis4.)