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A091692 (10^n-1) * (n+9) / 9. 0
0, 10, 121, 1332, 14443, 155554, 1666665, 17777776, 188888887, 1999999998, 21111111109, 222222222220, 2333333333331, 24444444444442, 255555555555553, 2666666666666664, 27777777777777775, 288888888888888886 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

Index entries for linear recurrences with constant coefficients, signature (22,-141,220,-100).

FORMULA

G.f.: x*(10-99*x+80*x^2) / ( (10*x-1)^2*(x-1)^2 ). - R. J. Mathar, Feb 14 2015

MATHEMATICA

LinearRecurrence[{22, -141, 220, -100}, {0, 10, 121, 1332}, 20] (* Harvey P. Dale, Mar 02 2017 *)

CROSSREFS

Cf. A091686.

Sequence in context: A027770 A330847 A202808 * A098309 A056116 A246643

Adjacent sequences:  A091689 A091690 A091691 * A091693 A091694 A091695

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Jan 29 2004

STATUS

approved

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Last modified September 28 19:12 EDT 2021. Contains 347717 sequences. (Running on oeis4.)