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A097168 Expansion of (1-7x)/((1-x)(1-9x)(1-10x)). 2
1, 13, 151, 1693, 18571, 200473, 2137591, 22571653, 236478211, 2461637233, 25488068431, 262725949213, 2697866876251, 27614135219593, 281860550309671, 2870078286120373, 29164037908416691, 295809674509083553 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
Partial sums of A097167.
a(n) = A097169(2n+1)/4.
LINKS
FORMULA
a(n) = 10*10^n/3 - 9*9^n/4 - 1/12.
a(n) = 20*a(n-1)-109*a(n-2)+90*a(n-3).
a(n) = A097169(2n+1)/4.
CROSSREFS
Sequence in context: A051475 A242576 A173448 * A305262 A296722 A252972
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Jul 30 2004
STATUS
approved

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Last modified February 22 04:44 EST 2024. Contains 370239 sequences. (Running on oeis4.)