Numbers k such that A030727(k) = 4.

Terms

a(0) =12a(1) =27a(2) =28a(3) =38a(4) =63a(5) =65a(6) =67a(7) =81a(8) =84a(9) =100a(10) =104a(11) =121a(12) =124a(13) =146a(14) =164a(15) =170a(16) =190a(17) =197a(18) =227a(19) =251a(20) =278a(21) =287a(22) =290a(23) =297a(24) =338a(25) =371a(26) =372a(27) =378a(28) =382a(29) =418