Composite numbers and 1 which yield a prime whenever a 1 is inserted anywhere in them, including at the beginning or end.
A216165
Composite numbers and 1 which yield a prime whenever a 1 is inserted anywhere in them, including at the beginning or end.
Terms
- a(0) =1a(1) =49a(2) =63a(3) =81a(4) =91a(5) =99a(6) =117a(7) =123a(8) =213a(9) =231a(10) =279a(11) =319a(12) =427a(13) =459a(14) =621a(15) =697a(16) =721a(17) =801a(18) =951a(19) =987a(20) =1113a(21) =1131a(22) =1261a(23) =1821a(24) =1939a(25) =2101a(26) =2149a(27) =2211a(28) =2517a(29) =2611
External references
- oeis: A216165