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Search: id:A081195
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A081195 a(n)=10a(n-1)-24a(n-2), a(0)=1, a(1)=25. +0
1
1, 25, 226, 1660, 11176, 71920, 450976, 2783680, 17013376, 103325440, 624933376, 3769523200, 22696830976, 136499752960, 820273586176, 4926741790720, 29580851838976, 177566715412480, 1065726709989376, 6395665929994240 (list; graph; listen)
OFFSET

0,2

FORMULA

G.f. (1+15x)/((1-4x)(1-6x)). a(n)=21*6^n/2-19*4^n/2.

CROSSREFS

Sequence in context: A034981 A053919 A053927 this_sequence A160222 A088890 A108178

Adjacent sequences: A081192 A081193 A081194 this_sequence A081196 A081197 A081198

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Mar 11 2003

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Last modified December 17 13:29 EST 2009. Contains 170826 sequences.


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