A158072 Primes p such that the sum of digits of p - the first digit of p is prime.

13, 17, 23, 37, 43, 47, 53, 67, 73, 83, 97, 103, 107, 149, 167, 211, 223, 229, 241, 283, 307, 311, 347, 349, 367, 383, 389, 421, 443, 449, 461, 467, 503, 521, 523, 541, 547, 607, 641, 643, 647, 661, 683, 743, 761, 811, 821, 823, 829, 883, 907, 911, 929, 941

Offset

1,1

Links

Table of n, a(n) for n=1..54.

Formula

A000040 SET-MINUS A158069. [From R. J. Mathar, Mar 17 2009]

Example

13(1+3-1=3), 17(1+7-1=7), 23(2+3-2=3), etc.

Crossrefs

Sequence in context: A211490 A038680 A227916 * A277689 A240894 A244078

Adjacent sequences: A158069 A158070 A158071 * A158073 A158074 A158075

Keyword

nonn,base,less

Author

Juri-Stepan Gerasimov, Mar 12 2009

Extensions

383 added by R. J. Mathar, Mar 17 2009

Status

approved