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 one of its immediate leftward or upward or right-upward antidiagonal neighbors.
A208872
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 one of its immediate leftward or upward or right-upward antidiagonal neighbors.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =5a(4) =12a(5) =5a(6) =15a(7) =136a(8) =143a(9) =15a(10) =51a(11) =1798a(12) =6520a(13) =1979a(14) =51a(15) =187a(16) =24472a(17) =307165a(18) =324682a(19) =28246a(20) =187a(21) =715a(22) =334618a(23) =14493405a(24) =52947540a(25) =16205218a(26) =405481a(27) =715a(28) =2795a(29) =4578580
External references
- oeis: A208872