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Search: id:A142048
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| A142048 |
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Denominators of polynomials P(0,x)=u(0) , P(n,x)= u(n) + x*sum(u(i)*P(n-i-1,x)) ,i=0, .. n-1, with u(i)=((-1)^i)/(2*i+1). Coefficients are 1, -1/3, 1, 1/5, -2/3, 1, -1/7, 23/45, -1, 1 . |
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+0
1
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| 1, 3, 1, 5, 3, 1, 7, 45, 1, 1, 9, 105, 15, 3, 1
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Odds? Numerators in today 1, -1, 1, 1, -2, 1, -1, 23 . In A130620 take P(n-i-1,x).
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CROSSREFS
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Sequence in context: A133094 A122510 A102662 this_sequence A117563 A060439 A135224
Adjacent sequences: A142045 A142046 A142047 this_sequence A142049 A142050 A142051
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KEYWORD
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nonn,uned
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Sep 14 2008
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