Initial primes in sets of 4 consecutive primes with common gap 54.

Terms

a(0) =400948369a(1) =473838319a(2) =583946599a(3) =678953059a(4) =816604199a(5) =972598819a(6) =1136526949a(7) =1466715139a(8) =1475790529a(9) =1499794999a(10) =1502149559a(11) =1610895679a(12) =1643313869a(13) =1673057219a(14) =1686181579a(15) =1845792019a(16) =1867046639a(17) =1907478889a(18) =1992202439a(19) =2011077869a(20) =2030490479a(21) =2207714969