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A154589 a(n)=A154570(n)+A154570(n+1). 5
4, -1, -2, -4, -8, -16, -32, -64, -128, -256, -512, -1024, -2048, -4096, -8192, -16384, -32768, -65536 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..17.

FORMULA

G.f.: (4-9x)/(1-2x). a(n+1)= -A000079(n). R. J. Mathar, Feb 25 2009

E.g.f.:  5 + x/(G(0)+1), where G(k) = 2*k - 1 - x/(1 + x/G(k+1) ); (continued fraction ). - Sergei N. Gladkovskii, Dec 27 2013

CROSSREFS

Sequence in context: A082903 A258770 A225815 * A188931 A125560 A046573

Adjacent sequences:  A154586 A154587 A154588 * A154590 A154591 A154592

KEYWORD

sign,easy

AUTHOR

Paul Curtz, Jan 12 2009

EXTENSIONS

Edited by N. J. A. Sloane, Jan 14 2009

STATUS

approved

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Last modified March 23 02:42 EDT 2019. Contains 321422 sequences. (Running on oeis4.)