109470domain: NAppears in sequencesValues of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,51.at n=28A064262Numbers k such that k+1, 2k+1, 3k+1, 4k+1 are all prime.at n=27A237189