0,2

Analog of A033453 (INVERT squares) and A001906 (INVERT first powers).

G.f.: (1+4x+x^2)/((1+x^2)(1-5x+x^2)). a(n) = (9*A004254(n+1)-4*A056594(n))/5.

Sequence in context: A074631 A084903 A034558 this_sequence A099867 A104470 A084016

Adjacent sequences: A144106 A144107 A144108 this_sequence A144110 A144111 A144112

nonn

R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 11 2008