A140512 Limit of A140485 (1, 4, 9, 13) table signed. Denominators of a sequence whose numerators are 1's.

1, -2, 3, -7, 10, -12, 15, -17, 20, -24, 27, -35

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