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A093421
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Triangle read by rows: for 1 <= k <= n, denominator of a(n, k) = [prod_{i = 0..k-1} n-i]/[sum_{i = 1..k} i].
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3
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1, 1, 3, 1, 1, 1, 1, 1, 1, 5, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 7, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 11, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 13, 1, 1, 1, 1, 1, 7, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| a(n, n) = 2*(n-1)!/(n+1).
A093420 gives the numerators.
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CROSSREFS
| Cf. A093415, A093420, A093423.
Sequence in context: A134866 A143261 A204116 * A146531 A030381 A030380
Adjacent sequences: A093418 A093419 A093420 * A093422 A093423 A093424
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KEYWORD
| nonn,easy,frac,tabl,less
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 30 2004
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EXTENSIONS
| Edited and extended by David Wasserman (dwasserm(AT)earthlink.net), Aug 29 2006
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