OFFSET
0,1
COMMENTS
The binomial transform yields -4 followed by the negative of A140657.
The inverse binomial transform yields essentially a signed version of A000244. - R. J. Mathar, Aug 02 2008
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (-1, 2).
FORMULA
O.g.f: (4-x)/((x-1)(2x+1)). - R. J. Mathar, Aug 02 2008
a(n) = -a(n-1) + 2*a(n-2); a(0)=-4, a(1)=5. - Harvey P. Dale, May 26 2011
MATHEMATICA
Table[3(-1)^(n+1)2^n-1, {n, 0, 40}] (* or *) LinearRecurrence[{-1, 2}, {-4, 5}, 40] (* Harvey P. Dale, May 26 2011 *)
PROG
(Magma) [3*(-1)^(n+1)*2^n-1: n in [0..40]]; // Vincenzo Librandi, Aug 08 2011
CROSSREFS
KEYWORD
sign
AUTHOR
Paul Curtz, Jul 11 2008
EXTENSIONS
Edited and extended by R. J. Mathar, Aug 02 2008
STATUS
approved