Number of 3Xn 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302878
Number of 3Xn 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =6a(2) =17a(3) =35a(4) =72a(5) =241a(6) =722a(7) =1821a(8) =4863a(9) =14841a(10) =43444a(11) =119306a(12) =335624a(13) =985356a(14) =2849009a(15) =8044468a(16) =22928355a(17) =66336411a(18) =190801483a(19) =543986757a(20) =1556622000a(21) =4478561650a(22) =12855871827a(23) =36783013974a(24) =105393294206a(25) =302583744944a(26) =867943015259
External references
- oeis: A302878