Array read by upwards antidiagonals: A(n, k) = index of prime(k)^n in A098550.

Terms

a(0) =2a(1) =4a(2) =3a(3) =6a(4) =5a(5) =9a(6) =14a(7) =19a(8) =11a(9) =15a(10) =29a(11) =57a(12) =94a(13) =40a(14) =22a(15) =65a(16) =171a(17) =483a(18) =269a(19) =124a(20) =23a(21) =137a(22) =549a(23) =2549a(24) =1996a(25) =1071a(26) =187a(27) =30a(28) =277a(29) =1786