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A165680
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Triangle of the divisors of the coefficients of triangles A138771 and A165675
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4
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1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 6, 1, 1, 1, 2, 6, 24, 1, 1, 1, 2, 6, 24, 120, 1, 1, 1, 2, 6, 24, 120, 720, 1, 1, 1, 2, 6, 24, 120, 720, 5040, 1, 1, 1, 2, 6, 24, 120, 720, 5040, 40320, 1, 1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,10
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FORMULA
| a(n) = A138771(n)/A165675(n-1).
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MAPLE
| nmax:=11: for n from 1 to nmax do a(n, 1):=1 od: for n from 2 to nmax do for m from 2 to n do a(n, m):=(m-2)! od: od: for n from 1 to nmax do seq(a(n, m), m=1..n) od;
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CROSSREFS
| Cf. A138771, A165675 and A000142.
A000012 (3x), A007395, A010722, A010863 equal the first six left hand columns.
A159333 equals, for n=>-1, all right hand columns.
A067078 equals the row sums.
Sequence in context: A061545 A126886 A179272 * A105685 A173749 A125090
Adjacent sequences: A165677 A165678 A165679 * A165681 A165682 A165683
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KEYWORD
| easy,nonn,tabl
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AUTHOR
| Johannes W. Meijer (meijgia(AT)hotmail.com), Oct 05 2009
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