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A129429 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 20 |
| 5 | 56 |
| 6 | 187 |
| 7 | 654 |
| 8 | 2705 |
| 9 | 12587 |
| 10 | 67902 |
| 11 | 417065 |
| 12 | 2897432 |
| 13 | 22382255 |
| 14 | 189930004 |
| 15 | 1750561160 |
| 16 | 17380043136 |
| 17 | 184653542135 |
| 18 | 2088649831822 |
| 19 | 25046462480066 |
| 20 | 317295911519901 |
| 21 | 4233450347175663 |
| 22 | 59329632953577985 |
| 23 | 871281036897298464 |
[1,3,7,20,56,187,654,2705,12587,67902,417065, 2897432,22382255,189930004,1750561160,17380043136, 184653542135,2088649831822,25046462480066, 317295911519901,4233450347175663, 59329632953577985,871281036897298464] |