Sequence relating to Pell numbers; a new technique

[Ralf Stephan]

A mail from Mitch Harris lead me to sign corrections in the table:

> a=3, b=-1, a(0)=1, a(1)=2, a(n) = F(2n+1)  (A001519)
> a=4, b= 1  ...                    F(3n+...)
> a=7, b=-1  ...                    F(4n+...)
> a=11, b= 1
> =====

Thanks! Goes to show that as long as you wait there will always be
errors...


ralf