OFFSET
0,2
FORMULA
Empirical g.f.: -2*x*(4*x^4-17*x^3-x-2) / ((x-1)^2*(4*x^2+3*x+1)^2). - Colin Barker, Oct 07 2015
CROSSREFS
KEYWORD
sign
AUTHOR
Jonas Wallgren, Apr 13 2007
EXTENSIONS
More terms from R. J. Mathar, Apr 30 2007
STATUS
approved