Primes containing only two distinct digits whose sum of digits is 28, the second perfect number.

A048518

Primes containing only two distinct digits whose sum of digits is 28, the second perfect number.

Terms

    a(0) =1999a(1) =9199a(2) =338383a(3) =383833a(4) =1181881a(5) =1881181a(6) =1881811a(7) =2222929a(8) =2922229a(9) =8118181a(10) =8188111a(11) =8881111a(12) =9222229a(13) =15551551a(14) =15555151a(15) =15555511a(16) =16166611a(17) =16616161a(18) =33333373a(19) =33733333a(20) =34434343a(21) =44334343a(22) =44343433a(23) =51155551a(24) =51515551a(25) =55155151a(26) =55155511a(27) =55515151

External references