Composites c where at least one base b with 1 < b < c exists such that b^(c-1) == 1 (mod c^2), i.e., composites c that are base-b 'Wieferich pseudoprimes' for at least one b between 1 and c.
A267288
Composites c where at least one base b with 1 < b < c exists such that b^(c-1) == 1 (mod c^2), i.e., composites c that are base-b 'Wieferich pseudoprimes' for at least one b between 1 and c.
Terms
- a(0) =133a(1) =451a(2) =561a(3) =871a(4) =904a(5) =1065a(6) =1105a(7) =1267a(8) =1729a(9) =1891a(10) =2059a(11) =2201a(12) =2501a(13) =2821a(14) =2993a(15) =3145a(16) =4641a(17) =5005a(18) =5551a(19) =5841a(20) =5963a(21) =6409a(22) =6541a(23) =6601a(24) =6697a(25) =7107a(26) =7471a(27) =7501a(28) =8321a(29) =8323
External references
- oeis: A267288