Sturdy prime numbers: p such that in binary notation k*p has at least as many 1-bits as p for all k > 0.
A143027
Sturdy prime numbers: p such that in binary notation k*p has at least as many 1-bits as p for all k > 0.
Terms
- a(0) =2a(1) =3a(2) =5a(3) =7a(4) =17a(5) =31a(6) =73a(7) =89a(8) =127a(9) =257a(10) =1801a(11) =2089a(12) =8191a(13) =65537a(14) =131071a(15) =178481a(16) =262657a(17) =524287a(18) =2099863a(19) =616318177a(20) =2147483647
External references
- oeis: A143027