902430720domain: NAppears in sequencesNumber of 4-ary Lyndon words of length n over Z_4 with trace 0 and subtrace 2.at n=18A074404Number of 4-ary Lyndon words of length n over Z_4 with trace 1 and subtrace 1.at n=18A074407Number of 4-ary Lyndon words of length n over Z_4 with trace 2 and subtrace 2.at n=18A074412