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

A186591

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

Terms

    a(0) =4294967296a(1) =48243a(2) =430183a(3) =3306753a(4) =21993587a(5) =53301263a(6) =71095231a(7) =78728809a(8) =86748644a(9) =89692007a(10) =94541176a(11) =120087461a(12) =205742497a(13) =372822912a(14) =600755929a(15) =913680450a(16) =1430990335a(17) =2201398558a(18) =3168904216a(19) =4468022885a(20) =6637262756

External references