Array read by rows: T(n,k) is the first prime with exactly n occurrences of decimal digit k.

Terms

a(0) =2a(1) =2a(2) =3a(3) =2a(4) =2a(5) =2a(6) =2a(7) =2a(8) =2a(9) =2a(10) =101a(11) =13a(12) =2a(13) =3a(14) =41a(15) =5a(16) =61a(17) =7a(18) =83a(19) =19a(20) =1009a(21) =11a(22) =223a(23) =233a(24) =443a(25) =557a(26) =661a(27) =277a(28) =881a(29) =199