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A081035 8th binomial transform of the periodic sequence (1,9,1,1,9,1...). +0
4
1, 17, 209, 2273, 23201, 228017, 2186609, 20620673, 192174401, 1775688017, 16304021009, 148995991073, 1356782533601, 12321773100017, 111671069983409, 1010465414433473, 9132169221980801, 82455386442384017, 743959522093353809 (list; graph; listen)
OFFSET

0,2

FORMULA

a(n)=9*a(n-1)+8*7^(n-1). a(n)=5*9^n-4*7^n.

CROSSREFS

Cf. A081034, A081036.

Sequence in context: A158005 A158006 A014921 this_sequence A016299 A016250 A070137

Adjacent sequences: A081032 A081033 A081034 this_sequence A081036 A081037 A081038

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Mar 03 2003

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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