A032729 Numbers n such that n prefixed by '4' and followed by '9' is a 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

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