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A211604 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 26 |
| 5 | 186 |
| 6 | 3138 |
| 7 | 206850 |
| 8 | 91058098 |
| 9 | 534571085778 |
| 10 | 126075037515248882 |
| 11 | 6062019374259400059294162 |
| 12 | 470527304983253008023608694415844658 |
| 13 | 1285056632958988628362087081869760004715744193806354 |
[1,1,2,6,26,186,3138,206850,91058098,534571085778, 126075037515248882,6062019374259400059294162, 470527304983253008023608694415844658, 12850566329589886283620870818697600047157441938063\ 54] |