Primes p such that q=2*p^2-1, r=2*p*q-1 and 2*p*r-1 are also prime.

Terms

a(0) =181a(1) =32341a(2) =52021a(3) =96907a(4) =97171a(5) =100981a(6) =109507a(7) =192601a(8) =194671a(9) =238237a(10) =280627a(11) =304651a(12) =320911a(13) =418321a(14) =449971a(15) =547537a(16) =579961a(17) =626191a(18) =668611a(19) =767857a(20) =769807a(21) =771091a(22) =806107a(23) =885097a(24) =954157a(25) =991381a(26) =993247a(27) =1028047a(28) =1075357a(29) =1259677