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A099913 Related to the Herschel graph. 1
1, 3, 25, 243, 2425, 24243, 242425, 2424243, 24242425, 242424243, 2424242425, 24242424243, 242424242425, 2424242424243, 24242424242425, 242424242424243, 2424242424242425, 24242424242424243, 242424242424242425 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Binomial transform is A099912.

LINKS

Table of n, a(n) for n=0..18.

FORMULA

G.f. : (1-7x-6x^2)/((1-x^2)(1-10x)); a(n)=10a(n-1)+a(n-2)-10a(n-3); a(n)=(-1)^n/11+8*10^n/33+2/3.

CROSSREFS

Sequence in context: A066221 A134272 A171640 * A245925 A260209 A086655

Adjacent sequences:  A099910 A099911 A099912 * A099914 A099915 A099916

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Oct 30 2004

STATUS

approved

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Last modified March 19 11:08 EDT 2019. Contains 321329 sequences. (Running on oeis4.)