Number of (n+1)X3 0..3 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero.
A205195
Number of (n+1)X3 0..3 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero.
Terms
- a(0) =1720a(1) =47900a(2) =1256641a(3) =25243114a(4) =469617426a(5) =7313092616a(6) =106645806148
External references
- oeis: A205195