Number of reduced magic borders of order n (these extend magic squares of order n-2 to order n).
A091990
Number of reduced magic borders of order n (these extend magic squares of order n-2 to order n).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =140a(4) =185a(5) =28490a(6) =3568a(7) =4117006a(8) =68166a(9) =695025466a(10) =1324149
External references
- oeis: A091990