Irregular triangle read by rows: T(n,k) is the number of distinct tilings by squares of an n X n square lattice that contain k nodes unconnected to any of their neighbors.
A226997
Irregular triangle read by rows: T(n,k) is the number of distinct tilings by squares of an n X n square lattice that contain k nodes unconnected to any of their neighbors.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =0a(6) =0a(7) =1a(8) =1a(9) =9a(10) =16a(11) =8a(12) =5a(13) =0a(14) =0a(15) =0a(16) =0a(17) =1a(18) =1a(19) =16a(20) =78a(21) =140a(22) =88a(23) =44a(24) =68a(25) =32a(26) =0a(27) =4a(28) =0a(29) =0
External references
- oeis: A226997