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A169601 a(n) = (10^n-1)^2 + 2. 0
2, 83, 9803, 998003, 99980003, 9999800003, 999998000003, 99999980000003, 9999999800000003, 999999998000000003, 99999999980000000003, 9999999999800000000003, 999999999998000000000003 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..12.

Index entries for linear recurrences with constant coefficients, signature (111,-1110,1000).

FORMULA

G.f.: -(2810*x^2-139*x+2)/((x-1)*(100*x-1)*(10*x-1)).

MATHEMATICA

(10^Range[0, 20]-1)^2+2 (* Harvey P. Dale, Jan 08 2019 *)

PROG

(PARI) for(n=0, 20, print1((10^n-1)^2+2", "))

CROSSREFS

Sequence in context: A232770 A317724 A099373 * A205643 A215263 A265591

Adjacent sequences:  A169598 A169599 A169600 * A169602 A169603 A169604

KEYWORD

nonn,easy

AUTHOR

Jason Earls, Dec 03 2009

STATUS

approved

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Last modified December 14 19:27 EST 2019. Contains 329987 sequences. (Running on oeis4.)