Triangle read by rows n>=0: the largest prime <= m^n+2 in columns m=3..n+3.

Terms

a(0) =3a(1) =5a(2) =5a(3) =11a(4) =17a(5) =23a(6) =29a(7) =61a(8) =127a(9) =211a(10) =83a(11) =257a(12) =619a(13) =1297a(14) =2399a(15) =241a(16) =1021a(17) =3121a(18) =7759a(19) =16787a(20) =32749a(21) =727a(22) =4093a(23) =15619a(24) =46649a(25) =117643a(26) =262139a(27) =531383a(28) =2179a(29) =16381