Number of nX6 0..1 arrays with every element unequal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.
A304261
Number of nX6 0..1 arrays with every element unequal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =33a(2) =26a(3) =88a(4) =230a(5) =925a(6) =2516a(7) =8248a(8) =27317a(9) =89074a(10) =287896a(11) =945232a(12) =3089403a(13) =10093067a(14) =33056134a(15) =108135876a(16) =354125720a(17) =1159096064a(18) =3795435852a(19) =12426659094a(20) =40688258392a(21) =133217543175a(22) =436196336127
External references
- oeis: A304261