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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 14 |
| 3 | 106 |
| 4 | 850 |
| 5 | 7074 |
| 6 | 59910 |
| 7 | 514168 |
| 8 | 4453946 |
| 9 | 38855488 |
| 10 | 341052122 |
| 11 | 3006680636 |
| 12 | 26619825378 |
| 13 | 236386648574 |
| 14 | 2105717447626 |
| 15 | 18798362729604 |
| 16 | 168222072625668 |
| 17 | 1507848061916274 |
| 18 | 13541292792666004 |
| 19 | 121763260320351938 |
[1,14,106,850,7074,59910,514168,4453946,38855488, 341052122,3006680636,26619825378,236386648574, 2105717447626,18798362729604,168222072625668, 1507848061916274,13541292792666004, 121763260320351938] |