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A032714 n prefixed by '6' and followed by '3' is a prime. 1
1, 4, 5, 7, 8, 11, 13, 14, 16, 17, 20, 26, 32, 34, 35, 37, 47, 55, 56, 65, 67, 70, 73, 76, 79, 80, 82, 83, 86, 88, 98, 104, 115, 122, 125, 128, 133, 134, 136, 140, 146, 148, 149, 154, 155, 158, 160, 161, 164, 167, 170, 172, 181, 184, 193, 200, 205, 214, 221 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

MATHEMATICA

Select[Range[300], PrimeQ[FromDigits[Join[{6}, IntegerDigits[#], {3}]]]&] (* Harvey P. Dale, Mar 09 2013 *)

CROSSREFS

Sequence in context: A228919 A047377 A188265 * A032702 A120753 A188322

Adjacent sequences:  A032711 A032712 A032713 * A032715 A032716 A032717

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, May 15 1998

STATUS

approved

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Last modified September 25 21:33 EDT 2017. Contains 292500 sequences.