A067463 Primes p such that p+sigma(p+1) is prime.

5, 13, 19, 23, 29, 37, 41, 43, 53, 59, 61, 67, 83, 101, 103, 113, 131, 149, 157, 163, 167, 193, 223, 227, 229, 239, 263, 271, 281, 283, 293, 311, 313, 331, 347, 349, 373, 397, 401, 433, 461, 467, 491, 503, 523, 563, 571, 599, 601, 607, 631, 643, 653, 661, 683

Offset

1,1

Links

Table of n, a(n) for n=1..55.

Prog

(PARI) isok(p) = isprime(p) && isprime(p+sigma(p+1)); \\ Michel Marcus, Feb 17 2021

Crossrefs

Cf. A008333, A067464.

Sequence in context: A028274 A272723 A245177 * A209663 A156111 A162174

Adjacent sequences: A067460 A067461 A067462 * A067464 A067465 A067466

Keyword

easy,nonn

Author

Benoit Cloitre, Feb 23 2002

Status

approved