The lowest number on Ulam Spiral for which all numbers in the square which is centered at a(n) and spans n-1 spaces in each cardinal direction are nonprime.
A357376
The lowest number on Ulam Spiral for which all numbers in the square which is centered at a(n) and spans n-1 spaces in each cardinal direction are nonprime.
Terms
- a(0) =1a(1) =26a(2) =1016a(3) =5136a(4) =39639a(5) =203100a(6) =2729736a(7) =32264250a(8) =42119062a(9) =1065799391a(10) =12444190246
External references
- oeis: A357376