cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A094317 Primes n with property that sum of digits that are primes is prime.

Original entry on oeis.org

2, 3, 5, 7, 13, 17, 23, 29, 31, 43, 47, 59, 67, 71, 79, 83, 97, 103, 107, 113, 131, 139, 151, 163, 167, 179, 193, 197, 211, 223, 227, 239, 241, 251, 263, 269, 281, 283, 293, 311, 337, 349, 353, 373, 389, 421, 431, 439, 443, 463, 467, 479, 487, 509
Offset: 1

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Author

Harvey Dale, May 31 2004

Keywords

Crossrefs

Cf. A094318.

A093806 Primes n with property that sum of digits is prime and number of prime digits is prime.

Original entry on oeis.org

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
Offset: 1

Views

Author

Jani Melik, May 19 2004

Keywords

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, ...

Crossrefs

Cf. A093805, A094317, A094318.
Showing 1-2 of 2 results.

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