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A176728
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Numerator of z-sequence for Sheffer triangle A060081.
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4
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1, 0, -1, 0, -17, 0, -1955, 0, -44089, 0, -4627969, 0, -10431967727, 0, -424734574531, 0, -187497600357613, 0, -263146180762981877, 0, -77335840394370605087, 0, -38414950218116664660463, 0, -95193934978797641162562791, 0, -1044549307308161782597280065, 0, -836232289988098415162220532417
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OFFSET
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1,5
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COMMENTS
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The denominator sequence is A176729.
For a- and z-sequences for Sheffer triangles see the W. Lang link under A006232.
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LINKS
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FORMULA
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E.g.f. for rationals A176728/A176729: (1-sqrt(1-x^2))/log(sqrt((1+x)/(1-x))). For n=0 one has 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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KEYWORD
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sign,easy,frac
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AUTHOR
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STATUS
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approved
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