A103874 Numbers k such that 2*P(k) + 3, 2*P(k+1) + 5, 2*P(k+2) + 7, 2*P(k+3) + 11 are also consecutive primes where P(i) = i-th prime.

110984, 134934, 147387, 190915, 349609, 412066, 432771, 682320, 782530, 927635, 999610, 1006286, 1010214, 1098286, 1199214, 1487104, 2275690, 3410484, 4133263, 4165508, 4783102, 4785240, 4977350, 5037012, 6047689, 6151406, 6427787, 6744378, 7047508, 8315079, 8579401

Offset

1,1

Links

Table of n, a(n) for n=1..31.

Prog

(PARI) lista(nn) = {my(k=1, v=[2, 3, 5, 7]); forprime(p=11, nn, k++; v=concat(v[2..4], p); if(ispseudoprime(2*v[1]+3) && nextprime(2*v[1]+4)==2*v[2]+5 && nextprime(2*v[2]+6)==2*v[3]+7 && nextprime(2*v[3]+8)==2*v[4]+11, print1(k, ", "))); } \\ Jinyuan Wang, Mar 05 2020

Crossrefs

Cf. A103873, A103875.

Sequence in context: A114684 A146888 A175535 * A195223 A205243 A223110

Adjacent sequences: A103871 A103872 A103873 * A103875 A103876 A103877

Keyword

nonn

Author

Pierre CAMI, Feb 19 2005

Extensions

More terms from Jinyuan Wang, Mar 05 2020

Status

approved