0,5

G.f.:(x^4*(x^5-x^4+x^3+x^2-2*x+2))/((x^6+x^3+1)*(x-1)^4) [From Maksym Voznyy (voznyy(AT)mail.ru), Jul 27 2009]

Third differences are [-2, 4] repeated. - M. F. Hasler, Sep 15 2009

Sequence in context: A049616 A064960 A143689 this_sequence A003600 A000135 A065220

Adjacent sequences: A011888 A011889 A011890 this_sequence A011892 A011893 A011894

nonn

N. J. A. Sloane (njas(AT)research.att.com).