A072366 Numbers x such that x + reverse of x is a prime.

1, 10, 100, 116, 118, 140, 142, 146, 158, 166, 170, 172, 178, 182, 188, 190, 196, 215, 217, 229, 239, 241, 245, 257, 265, 269, 271, 277, 281, 287, 295, 299, 314, 316, 328, 338, 340, 344, 356, 364, 368, 370, 376, 380, 386, 394, 398, 413, 415, 427, 437, 439

Offset: 1

Author

Shyam Sunder Gupta, Jul 18 2002

Keywords

• base
• easy
• nonn

Examples

			116 is a term because 116+611=727 is a prime.
		

Links

• Zak Seidov, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A056964, A072367.

Programs

Mathematica

Select[Range[1000], PrimeQ[ # + FromDigits[Reverse[IntegerDigits[ # ]]]] &] (* Tanya Khovanova, Jul 23 2007 *)

PARI

isok(n) = isprime(n+subst(Polrev(digits(n)), x, 10)); \\ Michel Marcus, Nov 29 2014