a(n) = Fibonacci(4*n) + 3, or Fibonacci(2*n+2)*Lucas(2*n-2).

A081072

a(n) = Fibonacci(4*n) + 3, or Fibonacci(2*n+2)*Lucas(2*n-2).

Terms

    a(0) =3a(1) =6a(2) =24a(3) =147a(4) =990a(5) =6768a(6) =46371a(7) =317814a(8) =2178312a(9) =14930355a(10) =102334158a(11) =701408736a(12) =4807526979a(13) =32951280102a(14) =225851433720

External references