a(n) = (Lucas(4n+1)-1)/5, or Fibonacci(2n)*Fibonacci(2n+1), or A081017(n)/5.

A081018

a(n) = (Lucas(4n+1)-1)/5, or Fibonacci(2n)*Fibonacci(2n+1), or A081017(n)/5.

Terms

    a(0) =0a(1) =2a(2) =15a(3) =104a(4) =714a(5) =4895a(6) =33552a(7) =229970a(8) =1576239a(9) =10803704a(10) =74049690a(11) =507544127a(12) =3478759200a(13) =23843770274a(14) =163427632719

External references