Indices of primes followed by a gap (distance to next larger prime) of 42.

Terms

a(0) =1879a(1) =3732a(2) =4059a(3) =4135a(4) =4714a(5) =5355a(6) =5948a(7) =6160a(8) =6841a(9) =7434a(10) =7724a(11) =7746a(12) =7952a(13) =7980a(14) =8081a(15) =8269a(16) =8580a(17) =9303a(18) =9395a(19) =9971a(20) =10045a(21) =10305a(22) =10968a(23) =11023a(24) =11135a(25) =11251a(26) =11338a(27) =11399a(28) =11515a(29) =11807