A178317 Primes with the property that if the digits are written digital clock style and the number is reflected across a horizontal line through the middle of the number, the result is still prime.

2, 3, 5, 11, 13, 23, 31, 53, 83, 101, 103, 113, 131, 181, 251, 311, 313, 331, 383, 521, 811, 823, 853, 881, 883, 1013, 1021, 1031, 1033, 1051, 1103, 1123, 1153, 1181, 1223, 1231, 1283, 1301, 1303, 1381, 1531, 1553, 1583, 1801, 1811, 1831, 2003, 2011, 2053

Offset: 1

Author

David Nacin, May 24 2010

Keywords

• nonn
• base

Examples

			For example when 251 is reflected it becomes 521 which is also a prime, but a different one.
		

Crossrefs

Cf. A018847.