T(n,k)=Number of nXk 0..1 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.
A201353
T(n,k)=Number of nXk 0..1 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.
Terms
- a(0) =0a(1) =2a(2) =2a(3) =2a(4) =4a(5) =2a(6) =3a(7) =8a(8) =8a(9) =3a(10) =4a(11) =14a(12) =18a(13) =14a(14) =4a(15) =5a(16) =23a(17) =47a(18) =47a(19) =23a(20) =5a(21) =6a(22) =36a(23) =118a(24) =191a(25) =118a(26) =36a(27) =6a(28) =7a(29) =54
External references
- oeis: A201353