333329domain: NAppears in sequencesSmallest number that can be made to take n steps to reach 0 under "k -> any product of 2 numbers whose concatenation is k".at n=37A035934Number of binary strings of length n with no substrings equal to 0001 0011 or 1100.at n=20A164459a(n) = Sum_{d|n} phi(d)^4.at n=34A342470