0,3

a(n) = 3 a(n-1) + 8 a(n-2).

O.g.f.: -x/(-1+3*x+8*x^2). a(n)=-16^n*(A^n-B^n)/sqrt(41) where A=-1/(3+sqrt(41)) and B=1/(sqrt(41)-3) . - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 29 2008

Sequence in context: A128948 A049181 A100233 this_sequence A062224 A093568 A083217

Adjacent sequences: A015522 A015523 A015524 this_sequence A015526 A015527 A015528

nonn,easy

Olivier Gerard (ogerard(AT)ext.jussieu.fr)