A056857 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 2 | | 2 | | 1 |
| | | | | | | | | 5 | | 6 | | 3 | | 1 |
| | | | | | | | 15 | | 20 | | 12 | | 4 | | 1 |
| | | | | | | 52 | | 75 | | 50 | | 20 | | 5 | | 1 |
| | | | | | 203 | | 312 | | 225 | | 100 | | 30 | | 6 | | 1 |
| | | | | 877 | | 1421 | | 1092 | | 525 | | 175 | | 42 | | 7 | | 1 |
| | | | 4140 | | 7016 | | 5684 | | 2912 | | 1050 | | 280 | | 56 | | 8 | | 1 |
| | | 21147 | | 37260 | | 31572 | | 17052 | | 6552 | | 1890 | | 420 | | 72 | | 9 | | 1 |
| | 115975 | | 211470 | | 186300 | | 105240 | | 42630 | | 13104 | | 3150 | | 600 | | 90 | | 10 | | 1 |
|
A056857 as a square array
| 1 | 1 | 2 | 5 | 15 | 52 | 203 | 877 | 4140 | 21147 | 115975
| | 1 | 2 | 6 | 20 | 75 | 312 | 1421 | 7016 | 37260 | 211470
| | 1 | 3 | 12 | 50 | 225 | 1092 | 5684 | 31572 | 186300
| | 1 | 4 | 20 | 100 | 525 | 2912 | 17052 | 105240
| | 1 | 5 | 30 | 175 | 1050 | 6552 | 42630
| | 1 | 6 | 42 | 280 | 1890 | 13104
| | 1 | 7 | 56 | 420 | 3150
| | 1 | 8 | 72 | 600
| | 1 | 9 | 90
| | 1 | 10
| | 1
|
A056857 as an upper right triangle
| 1 | 1 | 2 | 5 | 15 | 52 | 203 | 877 | 4140 | 21147 | 115975
| | 1 | 2 | 6 | 20 | 75 | 312 | 1421 | 7016 | 37260 | 211470
| | | 1 | 3 | 12 | 50 | 225 | 1092 | 5684 | 31572 | 186300
| | | | 1 | 4 | 20 | 100 | 525 | 2912 | 17052 | 105240
| | | | | 1 | 5 | 30 | 175 | 1050 | 6552 | 42630
| | | | | | 1 | 6 | 42 | 280 | 1890 | 13104
| | | | | | | 1 | 7 | 56 | 420 | 3150
| | | | | | | | 1 | 8 | 72 | 600
| | | | | | | | | 1 | 9 | 90
| | | | | | | | | | 1 | 10
| | | | | | | | | | | 1
|
|
