|
| |
|
|
A057417
|
|
Number of staircase polygons of area n with any number of (staircase polygon) holes on square lattice (not allowing rotations).
|
|
1
| |
|
|
1, 2, 4, 9, 20, 46, 105, 243, 561, 1303, 3026, 7047, 16419, 38314, 89454, 209056, 488810, 1143686, 2677074, 6269438, 14687799, 34423317, 80702234, 189258382, 443958607, 1041704375, 2444830929, 5739200960, 13475465449
(list; graph; refs; listen; history; internal format)
|
| |
| |
|
|
