Near-repdigit semiprimes with 6 as repeated digit.

Terms

a(0) =166a(1) =466a(2) =566a(3) =626a(4) =662a(5) =667a(6) =669a(7) =766a(8) =866a(9) =4666a(10) =5666a(11) =6166a(12) =6626a(13) =6646a(14) =6662a(15) =6663a(16) =6667a(17) =6686a(18) =6866a(19) =7666a(20) =46666a(21) =62666a(22) =65666a(23) =66166a(24) =66662a(25) =66667a(26) =66686a(27) =76666a(28) =616666a(29) =626666