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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 17 |
| 4 | 70 |
| 5 | 87 |
| 6 | 157 |
| 7 | 401 |
| 8 | 558 |
| 9 | 959 |
| 10 | 1517 |
| 11 | 22197 |
| 12 | 23714 |
| 13 | 45911 |
| 14 | 69625 |
| 15 | 185161 |
| 16 | 254786 |
| 17 | 439947 |
| 18 | 2014574 |
| 19 | 16556539 |
| 20 | 18571113 |
| 21 | 35127652 |
| 22 | 2126230233 |
| 23 | 2161357885 |
| 24 | 4287588118 |
| 25 | 36462062829 |
| 26 | 150135839434 |
| 27 | 186597902263 |
| 28 | 336733741697 |
| 29 | 860065385657 |
[1,1,2,17,70,87,157,401,558,959,1517,22197,23714, 45911,69625,185161,254786,439947,2014574,16556539, 18571113,35127652,2126230233,2161357885, 4287588118,36462062829,150135839434,186597902263, 336733741697,860065385657] |