Primes of the form 6k - 1 preceding the first-occurrence gaps in A334543.

Terms

a(0) =5a(1) =29a(2) =113a(3) =197a(4) =359a(5) =521a(6) =1109a(7) =1733a(8) =4289a(9) =6389a(10) =7349a(11) =8297a(12) =9059a(13) =12821a(14) =35603a(15) =37691a(16) =58787a(17) =59771a(18) =97673a(19) =105767a(20) =130649a(21) =148517a(22) =153749a(23) =180797a(24) =220019a(25) =328127a(26) =402593a(27) =406907a(28) =416693a(29) =542261