Array read by rows: row n lists the first 4 primes with n digits.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =13a(6) =17a(7) =19a(8) =101a(9) =103a(10) =107a(11) =109a(12) =1009a(13) =1013a(14) =1019a(15) =1021a(16) =10007a(17) =10009a(18) =10037a(19) =10039a(20) =100003a(21) =100019a(22) =100043a(23) =100049a(24) =1000003a(25) =1000033a(26) =1000037a(27) =1000039a(28) =10000019a(29) =10000079