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A091686 0^n+((n-9)/9)(1-10^n). 3
1, 8, 77, 666, 5555, 44444, 333333, 2222222, 11111111, 0, -1111111111, -22222222222, -333333333333, -4444444444444, -55555555555555, -666666666666666, -7777777777777777, -88888888888888888, -999999999999999999, -11111111111111111110, -122222222222222222221 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..20.

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

FORMULA

a(n)=P(n, n+1, -10) where P(n, m, z)=product{k=0..n-1, z-sum{j=1..m, w(n)^(jk)}}, where w(n)=e^(2pi*i/n), i=sqrt(-1)

CROSSREFS

Sequence in context: A232087 A105429 A225348 * A091691 A024103 A187638

Adjacent sequences:  A091683 A091684 A091685 * A091687 A091688 A091689

KEYWORD

sign

AUTHOR

Paul Barry, Jan 29 2004

STATUS

approved

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Last modified October 27 13:45 EDT 2021. Contains 348276 sequences. (Running on oeis4.)