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A172555 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 70 |
| 2 | 44730 |
| 3 | 60871300 |
| 4 | 116963796250 |
| 5 | 273957842462220 |
| 6 | 729833528645228700 |
| 7 | 2128370421607383353400 |
| 8 | 6637298299496411164868250 |
| 9 | 21796558191507153941744357500 |
| 10 | 74580431332898028185458459628980 |
| 11 | 263863554962023852690547420699517000 |
| 12 | 959794291357783500093926796260896462300 |
[1,70,44730,60871300,116963796250,273957842462220, 729833528645228700,2128370421607383353400, 6637298299496411164868250, 21796558191507153941744357500, 74580431332898028185458459628980, 263863554962023852690547420699517000, 959794291357783500093926796260896462300] |