487879

Appears in sequences

• Fibonacci-Collatz sequence: a(1)=1, a(2)=2; for n > 2, let fib = a(n-1) + a(n-2); if fib is odd then a(n) = 3*fib + 1 else a(n) = fib/2.at n=17A105801
• a(n) = (3*n*2^n+2^(n+4)+2*(-1)^n)/18.at n=17A172481