Primes 6k + 1 at the end of first-occurrence gaps in A330853.

Terms

a(0) =13a(1) =31a(2) =61a(3) =271a(4) =307a(5) =1381a(6) =1531a(7) =1987a(8) =2437a(9) =4423a(10) =7867a(11) =10243a(12) =16831a(13) =22273a(14) =24337a(15) =38557a(16) =40351a(17) =43543a(18) =69661a(19) =75511a(20) =100927a(21) =119047a(22) =171403a(23) =195691a(24) =204301a(25) =250423a(26) =480343a(27) =577807a(28) =590593a(29) =1164799