120895domain: NAppears in sequencesNumber of positive integers <= 10^n that are divisible by no prime exceeding 11.at n=15A107352Numbers n such that there is no other number k for which A155043(k) = A155043(n).at n=19A262509Parent nodes of nonzero terms of A262509: a(n) = A049820(A262509(n)).at n=19A262510