Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.

A298216

Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =13a(2) =20a(3) =40a(4) =89a(5) =195a(6) =451a(7) =1046a(8) =2453a(9) =5810a(10) =13796a(11) =32903a(12) =78633a(13) =188163a(14) =450830a(15) =1080857a(16) =2592672a(17) =6221496a(18) =14932953a(19) =35849159a(20) =86073611a(21) =206681378a(22) =496321653a(23) =1191918914a(24) =2862503060a(25) =6874749395a(26) =16511107561a(27) =39655346739a(28) =95242735994

External references