1,1

The subsequence of p in A208455 such that (p+6)/7 is a prime.

Also, the subsequence of terms of A071369 which end in the digit "1".

All terms are of the form 2520m+1. The m-values are listed in A208549.

Table of n, a(n) for n=1..19.

A207825(n) = A208549(n)*2520 + 1.

(PARI) {my(p=1); until(, isprime(p+=2520) | next; for(j=2, 7, isprime(p\j+1)|next(2)); print1(p", "))}

Sequence in context: A206176 A205430 A208455 * A204802 A227931 A254195

Adjacent sequences: A207822 A207823 A207824 * A207826 A207827 A207828

nonn

M. F. Hasler, Feb 28 2012

approved