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Search: id:A140431
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A140431 2*A094555(n). +0
1
0, 2, 2, 12, 22, 92, 222, 772, 2102, 6732, 19342, 59732, 175782, 534172, 1588862, 4793892, 14327062, 43090412, 129052782, 387595252, 1161911942, 3487483452, 10458955102, 31383855812, 94137586422, 282440721292, 847266239822 (list; graph; listen)
OFFSET

0,2

FORMULA

b(n) = A091002(n-1); b(n+1)-3b(n)= A077925(n-2), where b(n)=floor(a(n)/10).

CROSSREFS

Sequence in context: A092144 A059187 A054916 this_sequence A092900 A164961 A122007

Adjacent sequences: A140428 A140429 A140430 this_sequence A140432 A140433 A140434

KEYWORD

nonn

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Jun 19 2008

EXTENSIONS

Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 02 2008

page 1

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Last modified November 24 19:42 EST 2009. Contains 167435 sequences.


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