Number of (n+1)X2 0..2 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing.

A205057

Number of (n+1)X2 0..2 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing.

Terms

    a(0) =81a(1) =491a(2) =2830a(3) =14206a(4) =68508a(5) =311076a(6) =1375313a(7) =5904417a(8) =24933375a(9) =103696183a(10) =427081054a(11) =1744729352a(12) =7088213440a(13) =28671903248a(14) =115624112159a(15) =465198328593

External references