Semiprimes whose prime factors are distinct and the reversal of one factor is equal to the other.

A083815

Semiprimes whose prime factors are distinct and the reversal of one factor is equal to the other.

Terms

    a(0) =403a(1) =1207a(2) =2701a(3) =7663a(4) =35143a(5) =75007a(6) =117907a(7) =127087a(8) =140209a(9) =173809a(10) =197209a(11) =247021a(12) =257821a(13) =342127a(14) =382387a(15) =643063a(16) =692443a(17) =743623a(18) =1226221a(19) =1341331a(20) =1626151a(21) =1698661a(22) =1739161a(23) =2073991a(24) =2138791a(25) =2528611a(26) =2561011a(27) =3321133

External references