Largest prime < n^3.

Terms

a(0) =7a(1) =23a(2) =61a(3) =113a(4) =211a(5) =337a(6) =509a(7) =727a(8) =997a(9) =1327a(10) =1723a(11) =2179a(12) =2741a(13) =3373a(14) =4093a(15) =4909a(16) =5827a(17) =6857a(18) =7993a(19) =9257a(20) =10639a(21) =12163a(22) =13807a(23) =15619a(24) =17573a(25) =19681a(26) =21943a(27) =24379a(28) =26993a(29) =29789