A220725 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 1 | | 1 |
| | | | | | | | | 1 | | 2 | | 1 |
| | | | | | | | 1 | | 7 | | 4 | | 1 |
| | | | | | | 1 | | 21 | | 30 | | 8 | | 1 |
| | | | | | 1 | | 68 | | 230 | | 126 | | 16 | | 1 |
| | | | | 1 | | 221 | | 1819 | | 2586 | | 534 | | 32 | | 1 |
| | | | 1 | | 717 | | 14466 | | 52189 | | 29310 | | 2275 | | 64 | | 1 |
| | | 1 | | 2330 | | 114900 | | 1071230 | | 1485872 | | 331589 | | 9667 | | 128 | | 1 |
| | 1 | | 7571 | | 913187 | | 21914482 | | 78144195 | | 42378036 | | 3751888 |
|
A220725 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 7 | 21 | 68 | 221 | 717 | 2330 | 7571
| | 1 | 4 | 30 | 230 | 1819 | 14466 | 114900 | 913187
| | 1 | 8 | 126 | 2586 | 52189 | 1071230 | 21914482
| | 1 | 16 | 534 | 29310 | 1485872 | 78144195
| | 1 | 32 | 2275 | 331589 | 42378036
| | 1 | 64 | 9667 | 3751888
| | 1 | 128
| | 1
|
A220725 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 7 | 21 | 68 | 221 | 717 | 2330 | 7571
| | | 1 | 4 | 30 | 230 | 1819 | 14466 | 114900 | 913187
| | | | 1 | 8 | 126 | 2586 | 52189 | 1071230 | 21914482
| | | | | 1 | 16 | 534 | 29310 | 1485872 | 78144195
| | | | | | 1 | 32 | 2275 | 331589 | 42378036
| | | | | | | 1 | 64 | 9667 | 3751888
| | | | | | | | 1 | 128
| | | | | | | | | 1
| | | | | | | | |
|
|
