T(n,k)=Number of nXk 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
A280961
T(n,k)=Number of nXk 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =4a(4) =9a(5) =4a(6) =11a(7) =42a(8) =42a(9) =11a(10) =30a(11) =205a(12) =241a(13) =205a(14) =30a(15) =82a(16) =997a(17) =1554a(18) =1554a(19) =997a(20) =82a(21) =224a(22) =4850a(23) =9899a(24) =14106a(25) =9899a(26) =4850a(27) =224a(28) =612a(29) =23593
External references
- oeis: A280961