T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A320409
T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =4a(4) =6a(5) =4a(6) =8a(7) =14a(8) =14a(9) =8a(10) =16a(11) =35a(12) =47a(13) =35a(14) =16a(15) =32a(16) =95a(17) =156a(18) =156a(19) =95a(20) =32a(21) =64a(22) =257a(23) =548a(24) =786a(25) =548a(26) =257a(27) =64a(28) =128a(29) =700
External references
- oeis: A320409