104845

Appears in sequences

• Order of Fibonacci group F(n,4) (or 0 if the group is infinite).at n=13A202626
• a(n) = (4*n+1)*(2^(4*n+1)+(-1)^n*2^(2*n+1)+1).at n=3A202628
• Numbers k such that (2^k-1)^k == 1 (mod (2^k+1)*k^2) and 2^(k-1) != 1 (mod k).at n=5A384148