1568397606

Appears in sequences

• a(n) = F(2n+1) + F(2n-1) - 1.at n=22A005592
• Cyclotomic polynomials Phi_n at x=phi, ceiled up (where phi = tau = (sqrt(5)+1)/2).at n=43A063707
• a(n) = L(3*n)/L(n), where L(n) = Lucas number.at n=22A110391