T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero.

A205198

T(n,k)=Number of (n+1)X(k+1) 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) =1720a(3) =13366a(4) =47900a(5) =13366a(6) =83720a(7) =1256641a(8) =1256641a(9) =83720a(10) =496848a(11) =25243114a(12) =121990159a(13) =25243114a(14) =496848a(15) =2629706a(16) =469617426a(17) =8736632044a(18) =8736632044a(19) =469617426a(20) =2629706a(21) =13334897a(22) =7313092616a(23) =574289759868

External references