A032710 Numbers k such that k prefixed by '1' and followed by '3' is prime.

0, 1, 6, 7, 9, 10, 12, 15, 16, 19, 21, 22, 28, 30, 37, 42, 43, 45, 48, 49, 52, 54, 55, 58, 61, 66, 69, 72, 73, 75, 78, 82, 87, 91, 93, 97, 99, 100, 108, 109, 111, 117, 121, 124, 127, 135, 138, 139, 142, 144, 148, 150, 159, 163, 174, 178, 181, 183, 186, 190, 192

Offset

1,3

Links

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

Mathematica

Select[Range[0, 200], PrimeQ[FromDigits[Join[{1}, IntegerDigits[#], {3}]]]&] (* Harvey P. Dale, Dec 18 2012 *)

Crossrefs

Cf. A032702-A032733.

Sequence in context: A248178 A284094 A120183 * A188055 A287347 A216361

Adjacent sequences: A032707 A032708 A032709 * A032711 A032712 A032713

Keyword

nonn,base

Author

Patrick De Geest, May 15 1998

Extensions

Offset changed by Andrew Howroyd, Aug 13 2024

Status

approved