Primes p such that p, p+60, p+120, p+180 are consecutive primes.

Terms

a(0) =253444777a(1) =271386581a(2) =286000489a(3) =415893013a(4) =475992773a(5) =523294549a(6) =620164949a(7) =794689481a(8) =838188877a(9) =840725323a(10) =846389227a(11) =884106599a(12) =884951807a(13) =908725507a(14) =941796223a(15) =952288331a(16) =971614151a(17) =1002290693a(18) =1003166771a(19) =1006976797a(20) =1053792359a(21) =1097338313a(22) =1163141201