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Search: id:A067049
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| A067049 |
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Triangle T(n,r) = LCM(n,n-1,n-2,...,n-r+1)/LCM(1,2,3,...,r-1,r), 0 <= r < n. |
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+0
2
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| 1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 6, 2, 1, 1, 5, 10, 10, 5, 1, 1, 6, 15, 10, 5, 1, 1, 1, 7, 21, 35, 35, 7, 7, 1, 1, 8, 28, 28, 70, 14, 14, 2, 1, 1, 9, 36, 84, 42, 42, 42, 6, 3, 1, 1, 10, 45, 60, 210, 42, 42, 6, 3, 1, 1, 1, 11, 55, 165, 330, 462, 462, 66, 33, 11, 11, 1, 1, 12, 66, 110
(list; table; graph; listen)
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OFFSET
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0,5
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REFERENCES
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Amarnath Murthy, Some Notions on Least Common Multiples, Smarandache Notions Journal, Vol. 12, No. 1-2-3, Spring 2001.
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LINKS
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M. L. Perez et al., eds., Smarandache Notions Journal
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EXAMPLE
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1; 1,1; 1,2,1; 1,3,3,1; 1,4,6,2,1; ...
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CROSSREFS
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Diagonals give A067046, A067047, A067048. Row sums give A061297.
Sequence in context: A072704 A038792 A046688 this_sequence A090641 A055216 A128629
Adjacent sequences: A067046 A067047 A067048 this_sequence A067050 A067051 A067052
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KEYWORD
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nonn,tabl
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 30 2001
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)Eunet.yu), Dec 31 2001
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