0,1

Tanya Khovanova, Recursive Sequences

G.f.: 2/(1-3x+x^2). a(n)=3a(n-1)-a(n-2).

(PARI) a(n)=2*fibonacci(2*n+2)

A025169(n)=2*A001906(n+1).

Adjacent sequences: A025166 A025167 A025168 this_sequence A025170 A025171 A025172

Sequence in context: A074405 A068786 A102699 this_sequence A111282 A115730 A003142

nonn

w.meeussen (wouter.meeussen(AT)pandora.be)

Better description from Michael Somos