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 left-upward diagonal neighbors.
A208864
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 left-upward diagonal neighbors.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =5a(4) =11a(5) =5a(6) =15a(7) =127a(8) =127a(9) =15a(10) =51a(11) =1691a(12) =5796a(13) =1691a(14) =51a(15) =187a(16) =23047a(17) =273049a(18) =273049a(19) =23047a(20) =187a(21) =715a(22) =315203a(23) =12883280a(24) =44452082a(25) =12883280a(26) =315203a(27) =715a(28) =2795a(29) =4313071
External references
- oeis: A208864