Number of nX4 0..2 arrays with no element equal to more than one of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
A281536
Number of nX4 0..2 arrays with no element equal to more than one of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =1a(1) =104a(2) =2919a(3) =15624a(4) =52529a(5) =146956a(6) =385284a(7) =979866a(8) =2440042a(9) =5946178a(10) =14218134a(11) =33491002a(12) =77932633a(13) =179450414a(14) =409349989a(15) =926267006a(16) =2081273523a(17) =4647417316a(18) =10319376525a(19) =22798153410a(20) =50137931781a(21) =109808283414a(22) =239585399751
External references
- oeis: A281536