Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,7.

Terms

a(0) =30a(1) =156a(2) =618a(3) =660a(4) =1626a(5) =2550a(6) =4230a(7) =4356a(8) =4566a(9) =5658a(10) =6120a(11) =6708a(12) =7506a(13) =11496a(14) =15318a(15) =16746a(16) =18048a(17) =19140a(18) =19476a(19) =19686a(20) =20610a(21) =21030a(22) =22920a(23) =23130a(24) =24096a(25) =25188a(26) =26406a(27) =27918a(28) =29346a(29) =29598