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Search: id:A130032
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| 1, 1, 3, 21, 273, 5733, 177723, 7642089, 435599073, 31798732329, 2893684641939, 321198995255229, 42719466368945457, 6706956219924436749, 1227372988246171925067, 258975700519942276189137
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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See the M. Bruschi et al. reference given in A129467.
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FORMULA
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a(n)=sum(|A129467(n,m)|,m=0..n), n>=0.
For n > 0, a(n) = n! * Product_{k=1..n}[Gamma(k + 1/k)/Gamma(k - 1 + 1/k)] - Gerald McGarvey (gerald.mcgarvey(AT)comcast.net), Nov 05 2007
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CROSSREFS
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Cf. A130031 (signed row sums).
a(n+1), n>=0, also unsigned row sums of triangle A130559.
Sequence in context: A012131 A098278 A066206 this_sequence A126461 A000681 A055555
Adjacent sequences: A130029 A130030 A130031 this_sequence A130033 A130034 A130035
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KEYWORD
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nonn,easy
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) May 04 2007
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