489601domain: NAppears in sequencesNonprimes n such that Mod(n,4) == 1 and denominator(Fibonacci((n-1)/4)/n) = 1.at n=18A091982Number of Carlitz compositions of n with exactly two descents.at n=28A241692Frobenius pseudoprimes == 1,4 (mod 5) with respect to Fibonacci polynomial x^2 - x - 1.at n=31A319168