Numbers m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,39.

Terms

a(0) =3528a(1) =4620a(2) =8208a(3) =13668a(4) =21858a(5) =24978a(6) =26538a(7) =29268a(8) =30828a(9) =33870a(10) =34260a(11) =34728a(12) =44088a(13) =51030a(14) =58128a(15) =58440a(16) =61560a(17) =72948a(18) =79578a(19) =80670a(20) =95568a(21) =107580a(22) =109608a(23) =112338a(24) =118188a(25) =118890a(26) =124350a(27) =126690a(28) =142758a(29) =144708