130141domain: NAppears in sequencesSmallest value of k for which the expression k*2^(2^n-1)-1 is prime.at n=16A057160Expansion of Product_{k>=1} (1 + (x*(1 - x))^k).at n=35A307501Number of necklace compositions of n with no part circularly followed by a divisor or a multiple.at n=42A328601