Number of (2n+1) X (2n+1) black-and-white grids that are legal for crossword puzzles.
A323838
Number of (2n+1) X (2n+1) black-and-white grids that are legal for crossword puzzles.
Terms
- a(0) =1a(1) =15a(2) =397a(3) =35324a(4) =18446134a(5) =41752489852
External references
- oeis: A323838