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A133472 6 followed by numbers with n-1 0's between 1 and 5. 1
6, 15, 105, 1005, 10005, 100005, 1000005, 10000005, 100000005, 1000000005, 10000000005, 100000000005, 1000000000005, 10000000000005, 100000000000005, 1000000000000005, 10000000000000005, 100000000000000005 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (11,-10).

FORMULA

O.g.f.: -3*(-2+17*x)/((-1+x)*(-1+10*x)) = -5/(-1+x)-1/(-1+10*x) . a(n)=10*a(n-1)-45. - R. J. Mathar, Nov 30 2007

a(n)=10^(n-1)+5, with n>=1 - Paolo P. Lava, Dec 19 2007

a(n) = 10^n+5; [From Vincenzo Librandi, Aug 10 2011]

PROG

(MAGMA) [10^n+5: n in [0..20]]; // Vincenzo Librandi, Aug 10 2011

CROSSREFS

Cf. A068128, A133384.

Sequence in context: A068128 A013222 A013228 * A213873 A219771 A087137

Adjacent sequences:  A133469 A133470 A133471 * A133473 A133474 A133475

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Nov 29 2007

STATUS

approved

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Last modified June 28 09:49 EDT 2017. Contains 288813 sequences.