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Search: id:A062030
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| A062030 |
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Group even numbers into (2,4), (6,8,10,12), (14,16,18,20,22,24),...; a(n) = product of n-th group. |
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+0
2
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| 8, 5760, 42577920, 1300252262400, 111644006842368000, 21695920874860629196800, 8291067715225260172247040000, 5644260808699395278689265516544000, 6360332664265371581768550654463180800000, 11209384544297234954537967755979151481241600000, 29531169256166572959626706182319305835700813824000000
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,100
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EXAMPLE
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a(3) =14*16*18*20*22*24 = 42577920.
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PROGRAM
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(PARI) { for (n=1, 100, write("b062030.txt", n, " ", 2^(2*n)*(n^2 + n)!/(n^2 - n)!) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 30 2009]
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CROSSREFS
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Sequence in context: A055319 A029736 A093937 this_sequence A052497 A079189 A114133
Adjacent sequences: A062027 A062028 A062029 this_sequence A062031 A062032 A062033
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jun 02 2001
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EXTENSIONS
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More terms from Jason Earls (zevi_35711(AT)yahoo.com), Jun 10 2001
Typo in a(4) corrected by N. J. A. Sloane, Aug 31 2009 using the b-file.
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