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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 13 |
| 4 | 30 |
| 5 | 133 |
| 6 | 163 |
| 7 | 296 |
| 8 | 459 |
| 9 | 755 |
| 10 | 1969 |
| 11 | 53918 |
| 12 | 109805 |
| 13 | 163723 |
| 14 | 273528 |
| 15 | 437251 |
| 16 | 710779 |
| 17 | 3280367 |
| 18 | 7271513 |
| 19 | 25094906 |
| 20 | 82556231 |
| 21 | 107651137 |
| 22 | 5895717629 |
| 23 | 6003368766 |
| 24 | 23905823927 |
| 25 | 77720840547 |
| 26 | 179347505021 |
| 27 | 795110860631 |
| 28 | 974458365652 |
| 29 | 1769569226283 |
[1,1,4,13,30,133,163,296,459,755,1969,53918, 109805,163723,273528,437251,710779,3280367, 7271513,25094906,82556231,107651137,5895717629, 6003368766,23905823927,77720840547,179347505021, 795110860631,974458365652,1769569226283] |