OFFSET
1,1
COMMENTS
For definitions see A152658, of which this is a subsequence.
LINKS
Klaus Brockhaus, Table of n, a(n) for n=1..1000
EXAMPLE
First maximal chain of primes with three members (two links) is 5, 7, 11; the linking primes are 43, 83.
PROG
(PARI) {n=1; while(n<1470, c=0; a=prime(n); while(isprime(n*prime(n)+(n+1)*prime(n+1)), c++; n++); if(c==2, print1(a, ", ")); n++)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Klaus Brockhaus, Dec 17 2008
STATUS
approved