Prime numbers P such that Q=2*P^2-1, R=2*Q^2-1, S=2*R^2-1 and T=2*S^2-1 are all prime numbers.
A245659
Prime numbers P such that Q=2*P^2-1, R=2*Q^2-1, S=2*R^2-1 and T=2*S^2-1 are all prime numbers.
Terms
- a(0) =281683a(1) =496789a(2) =823421a(3) =1352753a(4) =1719217a(5) =6174109a(6) =8643149a(7) =9761051a(8) =9843529a(9) =16191167a(10) =19132121a(11) =19745797a(12) =23490473a(13) =28457797a(14) =31820429a(15) =32860271a(16) =36552277a(17) =37068569a(18) =43506569a(19) =44776981a(20) =46808903a(21) =55035047a(22) =55957807a(23) =67194403a(24) =75099137a(25) =83092897a(26) =86580421a(27) =89135089
External references
- oeis: A245659