A179630 Primes p such that p minus sum of its digits minus sum of the square of its digits is a prime.

11, 23, 31, 41, 43, 53, 61, 71, 73, 101, 103, 109, 113, 137, 149, 163, 167, 173, 179, 191, 193, 199, 223, 229, 239, 269, 283, 307, 337, 349, 359, 367, 373, 397, 401, 419, 431, 433, 439, 461, 463, 467, 479, 491, 503, 509, 563, 593, 599, 601, 607, 613, 641, 643

Offset

1,1

Links

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

Example

a(3)=31 since 31-(3+1)-(3^2+1^2)=31-4-10=17 is a prime

Crossrefs

Cf. A179629

Sequence in context: A158203 A161754 A038904 * A060399 A030665 A077501

Adjacent sequences: A179627 A179628 A179629 * A179631 A179632 A179633

Keyword

nonn,base

Author

Carmine Suriano, Jul 21 2010

Status

approved