a(n) = (F(8*n+6) - 2)/3, where F=A000045 (the Fibonacci sequence).

A049659

a(n) = (F(8*n+6) - 2)/3, where F=A000045 (the Fibonacci sequence).

Terms

    a(0) =2a(1) =125a(2) =5903a(3) =277346a(4) =13029389a(5) =612103967a(6) =28755857090

External references