

A093806


Primes n with property that sum of digits is prime and number of prime digits is prime.


0



23, 137, 157, 173, 223, 227, 229, 263, 283, 313, 317, 331, 337, 353, 359, 373, 379, 397, 557, 571, 577, 593, 733, 739, 751, 757, 773, 797, 823, 827, 937, 953, 977, 1033, 1123, 1213, 1217, 1231, 1237, 1259, 1277, 1279, 1297, 1303, 1307, 1321, 1327, 1367, 1433
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OFFSET

1,1


COMMENTS

a(2)=137, 137 is prime, sum of digits 11 is prime, number of prime digits {3,7} 2 is prime, a(6)=223, 223 is prime, sum of digits 7 is prime, number of prime digits {2,2,3} 3 is prime, a (15)=359, 359 is prime, sum of digits 17 is prime, number of prime digits {3,5} 2 is prime, ...


LINKS

Table of n, a(n) for n=1..49.


CROSSREFS

Cf. A093805, A094317, A094318.
Sequence in context: A009482 A191745 A260842 * A142679 A254758 A057883
Adjacent sequences: A093803 A093804 A093805 * A093807 A093808 A093809


KEYWORD

nonn,base


AUTHOR

Jani Melik, May 19 2004


STATUS

approved



