101073domain: NAppears in sequencesNumbers with palindromic order 5.at n=0A261912a(1)=0; thereafter a(2k)=k+a(k), a(2k+1)=6k+4+a(6k+4).at n=30A270814a(n) is the sum of the nonpowers of 2 in the 3x+1 sequence that starts at n.at n=30A347532