A068686 Let p = abc..k be a prime in base 10. Define mirror(p) = abc...k...cba. Sequence gives primes of the form mirror(p) for some p.

131, 191, 313, 373, 797, 10301, 11311, 12721, 13931, 16361, 17971, 18181, 19391, 19991, 30703, 35353, 71917, 72727, 77377, 78787, 90709, 93739, 96769, 98389, 1093901, 1117111, 1123211, 1129211, 1153511, 1163611, 1193911, 1201021

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..2000

Mathematica

Select[Table[FromDigits[Join[IntegerDigits[p], Reverse[Take[IntegerDigits[p], IntegerLength[p]-1]]]], {p, Prime[Range[5, 200]]}], PrimeQ] (* Harvey P. Dale, Mar 23 2024 *)

Crossrefs

Sequence in context: A032750 A270596 A085414 * A082807 A088288 A142068

Adjacent sequences: A068683 A068684 A068685 * A068687 A068688 A068689

Keyword

base,nonn,easy

Author

Amarnath Murthy, Mar 02 2002

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Jan 02 2003

Status

approved