a(n) = prime(prime(prime(prime(prime(A028815(n) - 1) - 1) - 1) - 1) - 1) - 1.

Terms

a(0) =1a(1) =2a(2) =150a(3) =4210a(4) =12496a(5) =43206a(6) =83046a(7) =161092a(8) =202966a(9) =305068a(10) =498936a(11) =633160a(12) =906426a(13) =1125418a(14) =1248412a(15) =1460566a(16) =1808478a(17) =2264752a(18) =2339136a(19) =3026112a(20) =3331266a(21) =3501748a(22) =4015168a(23) =4529520a(24) =5049852a(25) =5806336a(26) =6448536a(27) =6792726a(28) =7214610