T(n,k)=Number of nXk 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors.
A208201
T(n,k)=Number of nXk 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =5a(4) =14a(5) =5a(6) =15a(7) =178a(8) =178a(9) =15a(10) =51a(11) =2653a(12) =10366a(13) =2653a(14) =51a(15) =187a(16) =41272a(17) =639701a(18) =639701a(19) =41272a(20) =187a(21) =715a(22) =648569a(23) =39725054a(24) =156617480a(25) =39725054a(26) =648569a(27) =715a(28) =2795a(29) =10215440
External references
- oeis: A208201