Number of (n+3)X7 0..3 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock.

A186594

Number of (n+3)X7 0..3 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock.

Terms

    a(0) =3306753a(1) =104547a(2) =407733a(3) =2526165a(4) =5080629a(5) =5654805a(6) =5711805a(7) =5769381a(8) =5831421a(9) =5959701a(10) =6475413a(11) =9316941a(12) =19268469a(13) =36584472a(14) =55233771a(15) =81033246a(16) =128348841a(17) =198142701a(18) =273483585a(19) =378799581a(20) =578518521a(21) =897620265a(22) =1289310978a(23) =1848325452

External references