A085778 Primes whose reversal is a semiprime.

19, 41, 43, 47, 53, 59, 83, 103, 109, 127, 137, 163, 173, 193, 197, 229, 241, 263, 283, 307, 317, 331, 349, 367, 379, 397, 419, 431, 433, 439, 479, 491, 503, 509, 541, 547, 557, 563, 569, 587, 593, 599, 601, 607, 641, 643, 647, 661, 683, 719, 773, 811, 853

Offset: 1

Author

Jason Earls, Jul 23 2003

Keywords

• base
• easy
• nonn

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A001358.

Programs

Mathematica

Select[Prime[Range[200]],PrimeOmega[FromDigits[Reverse[ IntegerDigits[ #]]]] ==2&] (* Harvey P. Dale, Apr 24 2014 *)