66053domain: NAppears in sequencesFibonacci sequence beginning 11, 9.at n=19A206422Expansion of 1/(1 - Sum_{k>=2} (1 - floor(2/d(k)))*x^k), where d(k) is the number of divisors (A000005).at n=51A280544Values of terms in A380837 which are not in A379066.at n=26A380838