1256293

Appears in sequences

• Odd composite n such that n divides Fibonacci(n) + 1.at n=20A094395
• Composite numbers k that divide both Fibonacci(k+1) and Fibonacci(k) + 1.at n=16A094411
• Composite terms in A128288(n) = A023163(n)/3 for n>1.at n=27A128289
• Frobenius pseudoprimes == 2,3 (mod 5) with respect to Fibonacci polynomial x^2 - x - 1.at n=13A212423
• Smallest i such that prime(n) divides gcd(sigma(i), phi(i)) (cf. A009223).at n=49A222714
• Composites occurring as divisors of Fibonacci(p) with p prime.at n=5A238082