A049020 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 1 | | 1 |
| | | | | | | | | 2 | | 3 | | 1 |
| | | | | | | | 5 | | 10 | | 6 | | 1 |
| | | | | | | 15 | | 37 | | 31 | | 10 | | 1 |
| | | | | | 52 | | 151 | | 160 | | 75 | | 15 | | 1 |
| | | | | 203 | | 674 | | 856 | | 520 | | 155 | | 21 | | 1 |
| | | | 877 | | 3263 | | 4802 | | 3556 | | 1400 | | 287 | | 28 | | 1 |
| | | 4140 | | 17007 | | 28337 | | 24626 | | 11991 | | 3290 | | 490 | | 36 | | 1 |
| | 21147 | | 94828 | | 175896 | | 174805 | | 101031 | | 34671 | | 6972 | | 786 | | 45 | | 1 |
|
A049020 as a square array
| 1 | 1 | 2 | 5 | 15 | 52 | 203 | 877 | 4140 | 21147
| | 1 | 3 | 10 | 37 | 151 | 674 | 3263 | 17007 | 94828
| | 1 | 6 | 31 | 160 | 856 | 4802 | 28337 | 175896
| | 1 | 10 | 75 | 520 | 3556 | 24626 | 174805
| | 1 | 15 | 155 | 1400 | 11991 | 101031
| | 1 | 21 | 287 | 3290 | 34671
| | 1 | 28 | 490 | 6972
| | 1 | 36 | 786
| | 1 | 45
| | 1
|
A049020 as an upper right triangle
| 1 | 1 | 2 | 5 | 15 | 52 | 203 | 877 | 4140 | 21147
| | 1 | 3 | 10 | 37 | 151 | 674 | 3263 | 17007 | 94828
| | | 1 | 6 | 31 | 160 | 856 | 4802 | 28337 | 175896
| | | | 1 | 10 | 75 | 520 | 3556 | 24626 | 174805
| | | | | 1 | 15 | 155 | 1400 | 11991 | 101031
| | | | | | 1 | 21 | 287 | 3290 | 34671
| | | | | | | 1 | 28 | 490 | 6972
| | | | | | | | 1 | 36 | 786
| | | | | | | | | 1 | 45
| | | | | | | | | | 1
|
|
