T(n,k)=Number of nXk 0..1 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
A202979
T(n,k)=Number of nXk 0..1 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =4a(8) =4a(9) =1a(10) =1a(11) =7a(12) =17a(13) =7a(14) =1a(15) =1a(16) =14a(17) =58a(18) =58a(19) =14a(20) =1a(21) =1a(22) =31a(23) =215a(24) =385a(25) =215a(26) =31a(27) =1a(28) =1a(29) =69
External references
- oeis: A202979