OFFSET
0,2
FORMULA
Empirical g.f.: (x+1)*(8*x^4-6*x^3+x^2+12*x+1) / ((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
Corrected and extended by R. J. Mathar, Apr 30 2007
STATUS
approved