Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,9.

Terms

a(0) =30a(1) =228a(2) =498a(3) =1398a(4) =1758a(5) =2028a(6) =2280a(7) =3180a(8) =4800a(9) =5430a(10) =6150a(11) =6420a(12) =6708a(13) =7950a(14) =8688a(15) =9930a(16) =11838a(17) =13728a(18) =16518a(19) =16878a(20) =17490a(21) =19488a(22) =26040a(23) =28200a(24) =30108a(25) =30468a(26) =33528a(27) =33870a(28) =34140a(29) =34500