

A178513


Partial sums of 80^n


1



1, 81, 6481, 518481, 41478481, 3318278481, 265462278481, 21236982278481, 1698958582278481, 135916686582278481, 10873334926582278481, 869866794126582278481, 69589343530126582278481
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OFFSET

0,2


COMMENTS

Related to backward decimal expansion of fraction 1/79 and Pell numbers. [In which way? Joerg Arndt, May 17 2011]


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..150
Index entries for linear recurrences with constant coefficients, signature (81,80).


FORMULA

a(n) = 80*a(n1) + 1.
G.f.: 1/((180*x)*(1x)).
a(n)= (80^n1)/79, with n>=1 [From Paolo P. Lava, Jun 10 2010]


MATHEMATICA

Accumulate[80^Range[0, 20]] (* Harvey P. Dale, Aug 11 2014 *)


CROSSREFS

Cf. A000129, A021083, A038207, A178510, A178511, A178512
Sequence in context: A205199 A250612 A228974 * A016948 A206993 A223791
Adjacent sequences: A178510 A178511 A178512 * A178514 A178515 A178516


KEYWORD

nonn,easy


AUTHOR

Mark Dols, May 29 2010


STATUS

approved



