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Search: id:A087315
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| A087315 |
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a(n) = Product prime(k)^prime(n-k+1), k = 1 to n. |
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+0
4
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| 1, 4, 72, 21600, 190512000, 580909190400000, 428616352408083840000000, 859278392084450410309036800000000000, 2097197194438629126172451944256706311040000000000000
(list; graph; listen)
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OFFSET
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0,2
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EXAMPLE
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a(3) = 2^5*3^3*5^2 = 21600.
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MAPLE
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seq(product(ithprime(k)^ithprime(a-k+1), k=1..a), a=1..10);
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CROSSREFS
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Adjacent sequences: A087312 A087313 A087314 this_sequence A087316 A087317 A087318
Sequence in context: A012995 A076744 A024257 this_sequence A081460 A055556 A089665
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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), Sep 03 2003
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EXTENSIONS
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More terms from Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Dec 22 2004
Corrected by David Wasserman (wasserma(AT)spawar.navy.mil), May 02 2005
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