1,1

1/3 * (n^4 + 8n^2 + 3).

G.f.: x*(4-3*x+7*x^2-x^3+x^4)/(1-x)^5 [From Maksym Voznyy (voznyy(AT)mail.ru), Jul 27 2009]

Sequence in context: A095667 A119949 A131339 this_sequence A092091 A046995 A001585

Adjacent sequences: A047665 A047666 A047667 this_sequence A047669 A047670 A047671

nonn

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

G.f. proposed by Maksym Voznyy checked and corrected by R. J. Mathar, Sep 16 2009.