Number of (n+1) X 5 0..2 arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.
A186467
Number of (n+1) X 5 0..2 arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.
Terms
- a(0) =367a(1) =562a(2) =1203a(3) =3186a(4) =4875a(5) =9834a(6) =14883a(7) =31866a(8) =51057a(9) =105398a(10) =174289a(11) =347428a(12) =588058a(13) =1145866a(14) =1976438a(15) =3787644a(16) =6625638a(17) =12540516a(18) =22170114a(19) =41575892a(20) =74087098a(21) =137980420a(22) =247343794a(23) =458282956a(24) =825184634a(25) =1523024532a(26) =2751516210
External references
- oeis: A186467