Number of (2n+1) X (2n+1) black-and-white mirror-symmetric grids that are legal for crossword puzzles.
A325408
Number of (2n+1) X (2n+1) black-and-white mirror-symmetric grids that are legal for crossword puzzles.
Terms
- a(0) =1a(1) =5a(2) =35a(3) =436a(4) =11348a(5) =650798a(6) =78816939a(7) =19500572516
External references
- oeis: A325408