A032729 Numbers k such that k prefixed by '4' and followed by '9' is prime.

0, 1, 3, 4, 7, 9, 12, 13, 15, 21, 22, 25, 28, 33, 34, 40, 51, 54, 63, 64, 67, 72, 75, 78, 79, 88, 90, 91, 96, 99, 103, 114, 117, 118, 126, 129, 138, 139, 147, 151, 153, 154, 157, 160, 165, 166, 171, 172, 175, 180, 184, 187, 195, 196, 199, 201, 208, 213, 216

Offset

1,3

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

Select[Range[0, 300], PrimeQ[FromDigits[Join[{4}, IntegerDigits[#], {9}]]]&] (* Harvey P. Dale, Jun 04 2019 *)

Crossrefs

Cf. A032702-A032733.

Sequence in context: A111499 A077025 A280493 * A035270 A120451 A327621

Adjacent sequences: A032726 A032727 A032728 * A032730 A032731 A032732

Keyword

nonn,base

Author

Patrick De Geest, May 15 1998

Status

approved