The lowest positive-integer center for a square spiral whose center lies in an n X n square of nonprimes.
A358720
The lowest positive-integer center for a square spiral whose center lies in an n X n square of nonprimes.
Terms
- a(0) =1a(1) =8a(2) =21a(3) =133a(4) =278a(5) =507a(6) =4442a(7) =5383a(8) =22457a(9) =35628a(10) =177291a(11) =194162a(12) =642257a(13) =1062108a(14) =3351690
External references
- oeis: A358720