Number of nX3 0..1 arrays with every element equal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

A298714

Number of nX3 0..1 arrays with every element equal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =2a(2) =4a(3) =13a(4) =63a(5) =264a(6) =1005a(7) =4113a(8) =16720a(9) =67541a(10) =273173a(11) =1105028a(12) =4470455a(13) =18086203a(14) =73164414a(15) =295979201a(16) =1197372779a(17) =4843899390a(18) =19595676337a(19) =79273069299a(20) =320694228442

External references