Least multiple of n such that every partial concatenation followed by a 3 is prime.

Terms

a(0) =1a(1) =6a(2) =6a(3) =36a(4) =30a(5) =60a(6) =105a(7) =120a(8) =207a(9) =40a(10) =33a(11) =24a(12) =104a(13) =1246a(14) =285a(15) =192a(16) =476a(17) =450a(18) =228a(19) =100a(20) =294a(21) =660a(22) =483a(23) =2232a(24) =3275a(25) =3120a(26) =2025a(27) =1876a(28) =2204a(29) =1590