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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 10 |
| 3 | 41 |
| 4 | 168 |
| 5 | 717 |
| 6 | 3171 |
| 7 | 14064 |
| 8 | 63793 |
| 9 | 291614 |
| 10 | 1342355 |
| 11 | 6241899 |
| 12 | 29121390 |
| 13 | 136728440 |
| 14 | 644720130 |
| 15 | 3049649696 |
| 16 | 14485085422 |
| 17 | 68965374343 |
| 18 | 329289549850 |
| 19 | 1576109416647 |
| 20 | 7558354053698 |
| 21 | 36324991365101 |
| 22 | 174860231643710 |
| 23 | 843127328761125 |
| 24 | 4071533539551152 |
| 25 | 19687239798248824 |
| 26 | 95321169488056293 |
[1,3,10,41,168,717,3171,14064,63793,291614, 1342355,6241899,29121390,136728440,644720130, 3049649696,14485085422,68965374343,329289549850, 1576109416647,7558354053698,36324991365101, 174860231643710,843127328761125,4071533539551152, 19687239798248824,95321169488056293] |