a(n) is the largest prime < A051451(n) - 1.

Terms

a(0) =3a(1) =7a(2) =53a(3) =409a(4) =829a(5) =2503a(6) =27701a(7) =360337a(8) =720703a(9) =12252197a(10) =232792501a(11) =5354228843a(12) =26771144371a(13) =80313433159