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

A186596

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

Terms

    a(0) =53301263a(1) =884466a(2) =1824789a(3) =5654805a(4) =12478581a(5) =16898709a(6) =17002221a(7) =17171973a(8) =17632173a(9) =19933269a(10) =23358789a(11) =28260813a(12) =48277797a(13) =77435613a(14) =110277237a(15) =176424504a(16) =289297251a(17) =436495782a(18) =605022297a(19) =888171813a(20) =1371548721a(21) =2045376429

External references