Primes p such that (p+1)/2, (p+2)/3 and (p+3)/4 are also primes.

Terms

a(0) =12721a(1) =16921a(2) =19441a(3) =24481a(4) =49681a(5) =61561a(6) =104161a(7) =229321a(8) =255361a(9) =259681a(10) =266401a(11) =291721a(12) =298201a(13) =311041a(14) =331921a(15) =419401a(16) =423481a(17) =436801a(18) =446881a(19) =471241a(20) =525241a(21) =532801a(22) =539401a(23) =581521a(24) =600601a(25) =663601a(26) =704161a(27) =709921a(28) =783721a(29) =867001