Number of (n+3)X9 0..2 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock.

A186586

Number of (n+3)X9 0..2 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock.

Terms

    a(0) =1728546a(1) =79015a(2) =149305a(3) =328891a(4) =626233a(5) =811795a(6) =823249a(7) =841075a(8) =880969a(9) =1019683a(10) =1221265a(11) =1504507a(12) =2353993a(13) =3537235a(14) =4869121a(15) =7110411a(16) =10563977a(17) =14962483a(18) =20061441a(19) =27545691a(20) =39153465a(21) =55017603a(22) =74946417a(23) =104128395a(24) =148464553

External references