OFFSET
1,2
FORMULA
G.f.:(1-3*x^7+x^6-6*x^5+2*x^4-4*x^3+4*x^2+x)/((x-1)^2*(x^4+x^2-1)^2) [From Maksym Voznyy (voznyy(AT)mail.ru), Jul 27 2009]
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved