Irregular triangle T(n,k) read by rows: The number of tilings of the n X n board by 1 X 1 and k 3 X 3 squares, n >= 0, k >= 0.
A276171
Irregular triangle T(n,k) read by rows: The number of tilings of the n X n board by 1 X 1 and k 3 X 3 squares, n >= 0, k >= 0.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =4a(7) =1a(8) =9a(9) =1a(10) =16a(11) =30a(12) =12a(13) =1a(14) =1a(15) =25a(16) =132a(17) =200a(18) =79a(19) =1a(20) =36a(21) =360a(22) =1232a(23) =1246a(24) =1a(25) =49a(26) =780a(27) =5048a(28) =13211a(29) =11984
External references
- oeis: A276171