Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

A317378

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =5a(2) =18a(3) =36a(4) =94a(5) =270a(6) =731a(7) =1973a(8) =5388a(9) =14732a(10) =40185a(11) =109622a(12) =299224a(13) =816737a(14) =2229029a(15) =6083625a(16) =16604273a(17) =45318395a(18) =123687970a(19) =337583521a(20) =921372891a(21) =2514718793a(22) =6863464096a(23) =18732569928a(24) =51127124540a(25) =139542134747a(26) =380854732742

External references