Number of (n+2) X 7 0..3 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.

A186877

Number of (n+2) X 7 0..3 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.

Terms

    a(0) =104701a(1) =14221a(2) =28984a(3) =100600a(4) =214264a(5) =230224a(6) =260584a(7) =310528a(8) =410080a(9) =683224a(10) =1122832a(11) =1759144a(12) =3352075a(13) =5594230a(14) =8725153a(15) =15545365a(16) =25632073a(17) =40294021a(18) =70802629a(19) =117837190a(20) =187990240a(21) =326143906a(22) =544135555a(23) =875468515a(24) =1502329147

External references