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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 10 |
| 3 | 38 |
| 4 | 158 |
| 5 | 602 |
| 6 | 2382 |
| 7 | 9142 |
| 8 | 35492 |
| 9 | 136936 |
| 10 | 530404 |
| 11 | 2053848 |
| 12 | 7972272 |
| 13 | 30977742 |
| 14 | 120576112 |
| 15 | 469915012 |
| 16 | 1833813534 |
| 17 | 7164469910 |
| 18 | 28021000340 |
| 19 | 109699469798 |
| 20 | 429850240742 |
| 21 | 1685728936622 |
| 22 | 6615913739206 |
| 23 | 25983523253950 |
| 24 | 102115250446680 |
| 25 | 401557335718522 |
| 26 | 1579978592844064 |
| 27 | 6219928993470190 |
| 28 | 24498287876663618 |
| 29 | 96535916978924934 |
| 30 | 380568644820360668 |
[1,2,10,38,158,602,2382,9142,35492,136936,530404, 2053848,7972272,30977742,120576112,469915012, 1833813534,7164469910,28021000340,109699469798, 429850240742,1685728936622,6615913739206, 25983523253950,102115250446680,401557335718522, 1579978592844064,6219928993470190, 24498287876663618,96535916978924934, 380568644820360668] |