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Search: id:A093453
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| A093453 |
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1/1, 2*3/lcm(2,3), 4*5*6/lcm(4,5,6), 7*8*9*10/(lcm(7,8,9,10),... |
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+0
1
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| 1, 1, 2, 2, 6, 24, 48, 720, 720, 1440, 241920, 120960, 3628800, 14515200, 87091200, 958003200, 261273600, 2615348736000, 804722688000, 125536739328000, 2414168064000, 753220435968000, 256094948229120000, 22596613079040000
(list; graph; listen)
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OFFSET
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1,3
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EXAMPLE
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a(5) = 6 = (11*12*13*14*15)/{LCM(11,12,13,14,15)} = 360360/60060.
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MAPLE
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a:=n->product(j, j=n*(n-1)/2+1..n*(n+1)/2)/lcm(seq(j, j=n*(n-1)/2+1..n*(n+1)/2)): seq(a(n), n=1..27); (Deutsch)
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CROSSREFS
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Sequence in context: A138801 A069466 A076741 this_sequence A052660 A135407 A076726
Adjacent sequences: A093450 A093451 A093452 this_sequence A093454 A093455 A093456
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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), Apr 03 2004
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Aug 07 2005
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