A032710 n prefixed by '1' and followed by '3' is a 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

0,3

Links

Harvey P. Dale, Table of n, a(n) for n = 0..1000

Mathematica

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

Crossrefs

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

Status

approved