Lesser prime factor of semiprimes in A089539.

Terms

a(0) =2a(1) =2a(2) =3a(3) =5a(4) =11a(5) =7a(6) =71a(7) =61a(8) =5a(9) =11a(10) =3a(11) =97a(12) =83a(13) =23a(14) =7a(15) =2a(16) =3a(17) =263a(18) =71a(19) =20639383a(20) =11a(21) =281421719a(22) =3a(23) =811a(24) =401a(25) =1697a(26) =110298581317a(27) =29a(28) =33619a(29) =2