The only primes in single-prime centuries.

Terms

a(0) =155921a(1) =268343a(2) =413353a(3) =1004873a(4) =1140091a(5) =1272749a(6) =1280023a(7) =1357201a(8) =1422367a(9) =1444309a(10) =1451423a(11) =1468079a(12) =1491377a(13) =1553653a(14) =1561919a(15) =1653853a(16) =1655707a(17) =1733449a(18) =1904311a(19) =2045213a(20) =2046553a(21) =2052217a(22) =2116291a(23) =2166319a(24) =2244091