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Search: id:A009964
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| 1, 20, 400, 8000, 160000, 3200000, 64000000, 1280000000, 25600000000, 512000000000, 10240000000000, 204800000000000, 4096000000000000, 81920000000000000, 1638400000000000000, 32768000000000000000
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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T. D. Noe, Table of n, a(n) for n=0..100
Tanya Khovanova, Recursive Sequences
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FORMULA
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G.f.: 1/(1-20x), e.g.f.: exp(20x)
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PROGRAM
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(Other) sage: [lucas_number1(n, 20, 0) for n in xrange(1, 17)]# [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 29 2009]
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CROSSREFS
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a(n) = A159991(n)/A000244(n). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 02 2009]
Sequence in context: A019319 A083276 A057745 this_sequence A007577 A048987 A006494
Adjacent sequences: A009961 A009962 A009963 this_sequence A009965 A009966 A009967
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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