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A140512 Limit of A140485 (1, 4, 9, 13) table signed.  Denominators of a sequence whose numerators are 1's. 0
1, -2, 3, -7, 10, -12, 15, -17, 20, -24, 27, -35 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

With transform in A129891 or A100597 the converging sequence becomes a polynomial family whose roots are on a curve (in imaginary coordinates). See P. Flajolet, X. Gourdon, B. Salvy.

REFERENCES

P. Flajolet, X. Gourdon, B. Salvy, Gazette des mathematiciens, 1993, 55, pp. 67-78.

LINKS

Table of n, a(n) for n=0..11.

CROSSREFS

Sequence in context: A047531 A102808 A215937 * A285550 A171863 A101956

Adjacent sequences:  A140509 A140510 A140511 * A140513 A140514 A140515

KEYWORD

sign,uned

AUTHOR

Paul Curtz, Jul 01 2008

STATUS

approved

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Last modified July 14 15:44 EDT 2020. Contains 335729 sequences. (Running on oeis4.)