A064580 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 2 | | 2 |
| | | | | | | | | 1 | | 3 | | 5 | | 5 |
| | | | | | | | 1 | | 4 | | 9 | | 14 | | 13 |
| | | | | | | 1 | | 5 | | 14 | | 28 | | 40 | | 36 |
| | | | | | 1 | | 6 | | 20 | | 48 | | 87 | | 118 | | 104 |
| | | | | 1 | | 7 | | 27 | | 75 | | 161 | | 273 | | 357 | | 309 |
| | | | 1 | | 8 | | 35 | | 110 | | 270 | | 536 | | 866 | | 1100 | | 939 |
| | | 1 | | 9 | | 44 | | 154 | | 423 | | 951 | | 1782 | | 2772 | | 3441 | | 2905 |
| | 1 | | 10 | | 54 | | 208 | | 630 | | 1572 | | 3310 | | 5928 | | 8946 | | 10900 | | 9118 |
|
A064580 as a square array
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
| 2 | 5 | 9 | 14 | 20 | 27 | 35 | 44 | 54
| 5 | 14 | 28 | 48 | 75 | 110 | 154 | 208
| 13 | 40 | 87 | 161 | 270 | 423 | 630
| 36 | 118 | 273 | 536 | 951 | 1572
| 104 | 357 | 866 | 1782 | 3310
| 309 | 1100 | 2772 | 5928
| 939 | 3441 | 8946
| 2905 | 10900
| 9118
|
A064580 as an upper right triangle
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
| | | 2 | 5 | 9 | 14 | 20 | 27 | 35 | 44 | 54
| | | | 5 | 14 | 28 | 48 | 75 | 110 | 154 | 208
| | | | | 13 | 40 | 87 | 161 | 270 | 423 | 630
| | | | | | 36 | 118 | 273 | 536 | 951 | 1572
| | | | | | | 104 | 357 | 866 | 1782 | 3310
| | | | | | | | 309 | 1100 | 2772 | 5928
| | | | | | | | | 939 | 3441 | 8946
| | | | | | | | | | 2905 | 10900
| | | | | | | | | | | 9118
|
|