A090210 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 1 | | 1 |
| | | | | | | | 2 | | 1 | | 1 |
| | | | | | | 5 | | 7 | | 1 | | 1 |
| | | | | | 15 | | 87 | | 34 | | 1 | | 1 |
| | | | | 52 | | 1657 | | 2971 | | 209 | | 1 | | 1 |
| | | | 203 | | 43833 | | 513559 | | 163121 | | 1546 | | 1 | | 1 |
| | | 877 | | 1515903 | | 149670844 | | 326922081 | | 12962661 | | 13327 | | 1 | | 1 |
| | 4140 | | 65766991 | | 66653198353 | | 1346634725665 | | 363303011071 | | 1395857215 | | 130922 | | 1 | | 1 |
|
A090210 as a square array
| 1 | 1 | 2 | 5 | 15 | 52 | 203 | 877 | 4140
| | 1 | 1 | 7 | 87 | 1657 | 43833 | 1515903 | 65766991
| | 1 | 1 | 34 | 2971 | 513559 | 149670844 | 66653198353
| | 1 | 1 | 209 | 163121 | 326922081 | 1346634725665
| | 1 | 1 | 1546 | 12962661 | 363303011071
| | 1 | 1 | 13327 | 1395857215
| | 1 | 1 | 130922
| | 1 | 1
| | 1
|
A090210 as an upper right triangle
| 1 | 1 | 2 | 5 | 15 | 52 | 203 | 877 | 4140
| | 1 | 1 | 7 | 87 | 1657 | 43833 | 1515903 | 65766991
| | | 1 | 1 | 34 | 2971 | 513559 | 149670844 | 66653198353
| | | | 1 | 1 | 209 | 163121 | 326922081 | 1346634725665
| | | | | 1 | 1 | 1546 | 12962661 | 363303011071
| | | | | | 1 | 1 | 13327 | 1395857215
| | | | | | | 1 | 1 | 130922
| | | | | | | | 1 | 1
| | | | | | | | | 1
|
|
