Primes preceding record runs of composites coprime to 30 (A007775).

Terms

a(0) =7a(1) =47a(2) =113a(3) =317a(4) =523a(5) =1327a(6) =9551a(7) =15683a(8) =19609a(9) =25471a(10) =31397a(11) =155921a(12) =360653a(13) =370261a(14) =1349533a(15) =1357201a(16) =2010733a(17) =4652353a(18) =17051707a(19) =20831323a(20) =47326693a(21) =122164747a(22) =189695659a(23) =191912783a(24) =387096133a(25) =1294268491a(26) =1453168141a(27) =2300942549a(28) =3842610773a(29) =4302407359