Composite numbers which yield a prime whenever a 5 is inserted anywhere in them, excluding at the end.

A216167

Composite numbers which yield a prime whenever a 5 is inserted anywhere in them, excluding at the end.

Terms

    a(0) =9a(1) =21a(2) =57a(3) =63a(4) =69a(5) =77a(6) =87a(7) =93a(8) =153a(9) =231a(10) =381a(11) =407a(12) =413a(13) =417a(14) =501a(15) =531a(16) =581a(17) =651a(18) =669a(19) =741a(20) =749a(21) =783a(22) =791a(23) =987a(24) =1241a(25) =1551a(26) =1797a(27) =1971a(28) =2189a(29) =2981

External references