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Search: id:A062189
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| 0, 2, 20, 126, 648, 2970, 12636, 51030, 198288, 747954, 2755620, 9959598, 35429400, 124357194, 431530092, 1482720390, 5050815264, 17075199330, 57338232372, 191385721566, 635369601960, 2099044209402, 6903833113980
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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Harry J. Smith, Table of n, a(n) for n=0,...,200
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FORMULA
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a(n) = A002943(n)*A000244(n-2). Binomial transform of A007758.
G.f.: 2x(x+1)/(1-3x)^3. - Ralf Stephan (ralf(AT)ark.in-berlin.de), Mar 13 2003
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PROGRAM
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(PARI) { for (n=0, 200, write("b062189.txt", n, " ", n*(4*n + 2)*3^(n - 2)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 02 2009]
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CROSSREFS
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Sequence in context: A001797 A084894 A061004 this_sequence A094254 A093647 A003490
Adjacent sequences: A062186 A062187 A062188 this_sequence A062190 A062191 A062192
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KEYWORD
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nonn
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), Jun 13 2001
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