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A126557 Primes in A126556. 3
174737, 224327, 433813, 541447, 787243, 969667, 980081, 1080787, 1286581, 1372979, 1534513, 1567037, 1570649, 1577189, 1659673, 1726993, 1931291, 2242883, 2282041, 2415557, 2460827, 3162503, 3711047, 4090787, 4450373 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Prime interprimes of third order.

Primes that are the arithmetic mean of two consecutive prime interprimes of second order; primes of the form (A126555(k)+A126555(k+1))/2.

PROG

(PARI) {m=5000000; a=0; g=0; p=2; q=3; r=5; while(r<=m, if((p+r)/2==q, if(a>0, b=(a+q)/2; if(isprime(b), if(g>0, if(isprime(h=(g+b)/2), print1(h, ", "))); g=b)); a=q); p=q; q=r; r=nextprime(r+1))} - Klaus Brockhaus, Jan 11 2007

CROSSREFS

Cf. A006562 (balanced primes), A024675 (interprimes), A126554 (interprimes of second order), A126555 (prime interprimes of second order), A126556 (interprimes of third order).

Sequence in context: A205054 A029830 A202491 * A173705 A092012 A203406

Adjacent sequences:  A126554 A126555 A126556 * A126558 A126559 A126560

KEYWORD

nonn

AUTHOR

Artur Jasinski (grafix(AT)csl.pl), Dec 27 2006

EXTENSIONS

Edited and extended by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jan 11 2007

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Last modified February 15 17:13 EST 2012. Contains 205828 sequences.