Lesser prime factor of semiprimes in A089542.

Terms

a(0) =2a(1) =2a(2) =3a(3) =7a(4) =53a(5) =29a(6) =353a(7) =1549a(8) =8353a(9) =7a(10) =15889a(11) =1691419a(12) =347a(13) =67a(14) =1097a(15) =274177a(16) =43a(17) =18882774223a(18) =67a(19) =5197a(20) =1801088543a(21) =556114086547a(22) =44773a(23) =3062989a(24) =5641a(26) =18349361a(27) =607a(28) =51131a(29) =13217