Composite numbers such that exactly nine distinct permutations of digits give primes.

Terms

a(0) =1094a(1) =1349a(2) =1394a(3) =1457a(4) =1475a(5) =1490a(6) =1547a(7) =1574a(8) =1745a(9) =1754a(10) =1904a(11) =1934a(12) =1940a(13) =1943a(14) =3097a(15) =3149a(16) =3194a(17) =3419a(18) =3479a(19) =3497a(20) =3679a(21) =3749a(22) =3790a(23) =3794a(24) =3796a(25) =3914a(26) =3941a(27) =3970a(28) =3974a(29) =3976