55477domain: NAppears in sequencesNumber of nonisomorphic ways a loop can cross a road (running East-West) 2n times.at n=8A078591Numbers n such that mu(n) + mu(n+1) + mu(n+2) + mu(n+3) + mu(n+4) + mu(n+5) + mu(n+6) = 6.at n=34A082967Numbers k such that k+i^2, i=0..6 are all semiprimes.at n=8A361262