Initial prime in set of 4 consecutive primes with common gap 48.

Terms

a(0) =55410683a(1) =102291263a(2) =141430363a(3) =226383163a(4) =280064453a(5) =457433213a(6) =531290533a(7) =542418463a(8) =555695713a(9) =582949903a(10) =629444003a(11) =664652203a(12) =665813153a(13) =777809113a(14) =802919653a(15) =852404053a(16) =887653633a(17) =894328243a(18) =898734673a(19) =979048313a(20) =993517643