Numbers m such that there are precisely 18 groups of order m.

Terms

a(0) =156a(1) =342a(2) =444a(3) =666a(4) =732a(5) =876a(6) =930a(7) =1164a(8) =1308a(9) =1314a(10) =1830a(11) =1884a(12) =1962a(13) =2172a(14) =2286a(15) =2316a(16) =2748a(17) =2892a(18) =2934a(19) =3258a(20) =3324a(21) =3582a(22) =3675a(23) =3756a(24) =4044a(25) =4125a(26) =4188a(27) =4422a(28) =4476a(29) =4530