A247507 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 1 | | 1 |
| | | | | | | | | 1 | | 2 | | 2 |
| | | | | | | | 1 | | 3 | | 6 | | 5 |
| | | | | | | 1 | | 4 | | 12 | | 22 | | 14 |
| | | | | | 1 | | 5 | | 20 | | 57 | | 90 | | 42 |
| | | | | 1 | | 6 | | 30 | | 116 | | 300 | | 394 | | 132 |
| | | | 1 | | 7 | | 42 | | 205 | | 740 | | 1686 | | 1806 | | 429 |
| | | 1 | | 8 | | 56 | | 330 | | 1530 | | 5028 | | 9912 | | 8558 | | 1430 |
| | 1 | | 9 | | 72 | | 497 | | 2814 | | 12130 | | 35700 | | 60213 | | 41586 | | 4862 |
|
A247507 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
| | 2 | 6 | 12 | 20 | 30 | 42 | 56 | 72
| | 5 | 22 | 57 | 116 | 205 | 330 | 497
| | 14 | 90 | 300 | 740 | 1530 | 2814
| | 42 | 394 | 1686 | 5028 | 12130
| | 132 | 1806 | 9912 | 35700
| | 429 | 8558 | 60213
| | 1430 | 41586
| | 4862
|
A247507 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
| | | 2 | 6 | 12 | 20 | 30 | 42 | 56 | 72
| | | | 5 | 22 | 57 | 116 | 205 | 330 | 497
| | | | | 14 | 90 | 300 | 740 | 1530 | 2814
| | | | | | 42 | 394 | 1686 | 5028 | 12130
| | | | | | | 132 | 1806 | 9912 | 35700
| | | | | | | | 429 | 8558 | 60213
| | | | | | | | | 1430 | 41586
| | | | | | | | | | 4862
|
|
