A085880 as a triangular array
| | | | | | | | | | 1 |
| | | | | | | | | | 1 | | 1 |
| | | | | | | | | 2 | | 4 | | 2 |
| | | | | | | | 5 | | 15 | | 15 | | 5 |
| | | | | | | 14 | | 56 | | 84 | | 56 | | 14 |
| | | | | | 42 | | 210 | | 420 | | 420 | | 210 | | 42 |
| | | | | 132 | | 792 | | 1980 | | 2640 | | 1980 | | 792 | | 132 |
| | | | 429 | | 3003 | | 9009 | | 15015 | | 15015 | | 9009 | | 3003 | | 429 |
| | | 1430 | | 11440 | | 40040 | | 80080 | | 100100 | | 80080 | | 40040 | | 11440 | | 1430 |
| | 4862 | | 43758 | | 175032 | | 408408 | | 612612 | | 612612 | | 408408 | | 175032 | | 43758 | | 4862 |
|
A085880 as a square array
1 | 1 | 2 | 5 | 14 | 42 | 132 | 429 | 1430 | 4862
| 1 | 4 | 15 | 56 | 210 | 792 | 3003 | 11440 | 43758
| 2 | 15 | 84 | 420 | 1980 | 9009 | 40040 | 175032
| 5 | 56 | 420 | 2640 | 15015 | 80080 | 408408
| 14 | 210 | 1980 | 15015 | 100100 | 612612
| 42 | 792 | 9009 | 80080 | 612612
| 132 | 3003 | 40040 | 408408
| 429 | 11440 | 175032
| 1430 | 43758
| 4862
|
A085880 as an upper right triangle
1 | 1 | 2 | 5 | 14 | 42 | 132 | 429 | 1430 | 4862
| | 1 | 4 | 15 | 56 | 210 | 792 | 3003 | 11440 | 43758
| | | 2 | 15 | 84 | 420 | 1980 | 9009 | 40040 | 175032
| | | | 5 | 56 | 420 | 2640 | 15015 | 80080 | 408408
| | | | | 14 | 210 | 1980 | 15015 | 100100 | 612612
| | | | | | 42 | 792 | 9009 | 80080 | 612612
| | | | | | | 132 | 3003 | 40040 | 408408
| | | | | | | | 429 | 11440 | 175032
| | | | | | | | | 1430 | 43758
| | | | | | | | | | 4862
|
|