Number of (n+1)X5 0..3 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

A186477

Number of (n+1)X5 0..3 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

Terms

    a(0) =1251a(1) =2049a(2) =4810a(3) =16762a(4) =25633a(5) =67714a(6) =101305a(7) =286290a(8) =456113a(9) =1219034a(10) =2037173a(11) =5189546a(12) =9017049a(13) =22136029a(14) =39734818a(15) =94665157a(16) =174517432a(17) =405721297a(18) =764487337a(19) =1742099164a(20) =3341954341a(21) =7491958474a(22) =14584990777a(23) =32261305429

External references