a(n) cannot be prefixed or followed by any digit to form a prime ('empty' prefixes allowed).

Terms

a(0) =14612a(1) =27971a(2) =29289a(3) =33170a(4) =36186a(5) =38327a(6) =39608a(7) =40078a(8) =41165a(9) =41528a(10) =43277a(11) =44657a(12) =47382a(13) =55553a(14) =55791a(15) =58899a(16) =60806a(17) =62318a(18) =63056a(19) =65970a(20) =66818a(21) =70558a(22) =73851a(23) =80477a(24) =81167a(25) =83986a(26) =86145a(27) =89072a(28) =89280a(29) =90379