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1, 4, 2, 6, 9, 3, 8, 20, 16, 4, 10, 35, 45, 25, 5, 12, 54, 96, 84, 36, 6, 14, 77, 175, 210, 140, 49, 7, 16, 104, 288, 440, 400, 216, 64, 8, 18, 135, 441, 819, 945, 693, 315, 81, 9, 20, 170, 640, 1400, 1960, 1820, 1120, 440, 100, 10
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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Triangle, T(n,k) = (n+1) * A029635(n,n-k) for n > 0.
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EXAMPLE
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First few rows of the triangle are:
1;
4, 2;
6, 9, 3;
8, 20, 16, 4;
10, 35, 45, 25, 5;
12, 54, 96, 84, 36, 6;
14, 77, 175, 210, 140, 49, 7;
...
Row 3 = (8, 20, 16, 4) = 4 * (2, 5, 4, 1), where (2, 5, 4, 1) = row 3 of A029653, (2,1) Pascal's triangle.
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PROG
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(Haskell)
a134239 n k = a134239_tabl !! n !! k
a134239_row n = a134239_tabl !! n
a134239_tabl = [1] : zipWith (map . (*))
[2..] (map reverse $ tail a029635_tabl)
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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