a(n) = a(-n) = 34*a(n-1) - a(n-2), and a(0)=1, a(1)=17.

A056771

a(n) = a(-n) = 34*a(n-1) - a(n-2), and a(0)=1, a(1)=17.

Terms

    a(0) =1a(1) =17a(2) =577a(3) =19601a(4) =665857a(5) =22619537a(6) =768398401a(7) =26102926097a(8) =886731088897

External references