Number of (0,1)-matrices with sum of entries equal to 2*n or 2*n+1, no zero rows or columns, which are centrally symmetric.
A373027
Number of (0,1)-matrices with sum of entries equal to 2*n or 2*n+1, no zero rows or columns, which are centrally symmetric.
Terms
- a(0) =1a(1) =4a(2) =32a(3) =400a(4) =6660a(5) =138576a(6) =3460464a(7) =100821904a(8) =3357239440a(9) =125768516416
External references
- oeis: A373027