Number of (n+1)X2 0..3 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero.
A205194
Number of (n+1)X2 0..3 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero.
Terms
- a(0) =207a(1) =1720a(2) =13366a(3) =83720a(4) =496848a(5) =2629706a(6) =13334897a(7) =63159947a(8) =289222067a(9) =1267265078a(10) =5406867620a(11) =22378349496a(12) =90688749158a(13) =359505989852
External references
- oeis: A205194