a(1) = 1 then the least multiple of odd numbers not odd multiples of 5, (3,7,9,11,13,17,19,21,23,27,29,...) such that every partial concatenation is noncomposite.

A110433

a(1) = 1 then the least multiple of odd numbers not odd multiples of 5, (3,7,9,11,13,17,19,21,23,27,29,...) such that every partial concatenation is noncomposite.

Terms

    a(0) =1a(1) =3a(2) =7a(3) =63a(4) =77a(5) =39a(6) =357a(7) =57a(8) =21a(9) =1909a(10) =567a(11) =1827a(12) =713a(13) =1353a(14) =21349a(15) =273a(16) =533a(17) =43a(18) =4559a(19) =7497a(20) =1989a(21) =1749a(22) =5529a(23) =49029a(24) =7747a(25) =3843a(26) =1943a(27) =1449a(28) =13987a(29) =24893

External references