T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318045
T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =2a(8) =2a(9) =1a(10) =1a(11) =3a(12) =8a(13) =3a(14) =1a(15) =1a(16) =6a(17) =21a(18) =21a(19) =6a(20) =1a(21) =1a(22) =17a(23) =86a(24) =140a(25) =86a(26) =17a(27) =1a(28) =1a(29) =46
External references
- oeis: A318045