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A176729
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Denominator of z-sequence for Sheffer triangle A060081.
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4
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1, 2, 1, 4, 1, 6, 1, 24, 1, 10, 1, 12, 1, 210, 1, 48, 1, 90, 1, 420, 1, 330, 1, 360, 1, 1638, 1, 28, 1, 30, 1, 7392, 1, 510, 1, 36, 1, 51870, 1, 840, 1, 6930, 1, 13860, 1, 4830, 1, 1008, 1, 99450, 1, 5148, 1, 2970, 1, 3192, 1, 870, 1, 180, 1, 2792790, 1, 137280, 1, 1530, 1, 5796
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OFFSET
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1,2
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COMMENTS
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The numerator sequence is A176728.
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LINKS
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Table of n, a(n) for n=1..68.
W. Lang: Rationals A176728/A176729 .
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FORMULA
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E.g.f. for rationals A176728/A176729: (1-sqrt(1- x^2))/ln(sqrt((1+x)/(1-x))). For n=0 one has a(0)=1, hence A176728(0)/a(0)=0.
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EXAMPLE
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Rationals A176728/A176729 with offset 0: [0,1/2,0,-1/4,0,-17/6,0,-1955/24,0,-44089/10,0,-4627969/12,... ].
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CROSSREFS
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A176726/A176727 a-sequence for triangle A060081.
Sequence in context: A147365 A147064 A147228 * A074643 A060794 A074919
Adjacent sequences: A176726 A176727 A176728 * A176730 A176731 A176732
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KEYWORD
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nonn,easy,frac
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AUTHOR
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Wolfdieter Lang, Jul 14 2010
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STATUS
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approved
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