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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 29 |
| 4 | 219 |
| 5 | 1949 |
| 6 | 20587 |
| 7 | 245237 |
| 8 | 3289577 |
| 9 | 48670973 |
| 10 | 788572541 |
| 11 | 13849348105 |
| 12 | 262283664739 |
| 13 | 5317530185889 |
| 14 | 114939490137235 |
| 15 | 2636612228192969 |
| 16 | 63955437488072593 |
| 17 | 1634890446576454297 |
| 18 | 43920715897460109205 |
| 19 | 1236660724225711901749 |
| 20 | 36412086992371220561771 |
[1,1,5,29,219,1949,20587,245237,3289577,48670973, 788572541,13849348105,262283664739,5317530185889, 114939490137235,2636612228192969, 63955437488072593,1634890446576454297, 43920715897460109205,1236660724225711901749, 36412086992371220561771] |