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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 12 |
| 4 | 47 |
| 5 | 168 |
| 6 | 532 |
| 7 | 1344 |
| 8 | 2707 |
| 9 | 5064 |
| 10 | 11236 |
| 11 | 24768 |
| 12 | 53614 |
| 13 | 112464 |
| 14 | 222564 |
| 15 | 411008 |
| 16 | 723884 |
| 17 | 1263696 |
| 18 | 2236452 |
| 19 | 3953448 |
| 20 | 6855498 |
| 21 | 11544816 |
| 22 | 18880992 |
| 23 | 30104592 |
| 24 | 46815126 |
| 25 | 70776080 |
| 26 | 103864092 |
| 27 | 148069152 |
| 28 | 205499496 |
| 29 | 278917752 |
| 30 | 373204912 |
| 31 | 496855592 |
| 32 | 663056406 |
| 33 | 890682648 |
| 34 | 1205069272 |
[1,3,12,47,168,532,1344,2707,5064,11236,24768, 53614,112464,222564,411008,723884,1263696,2236452, 3953448,6855498,11544816,18880992,30104592, 46815126,70776080,103864092,148069152,205499496, 278917752,373204912,496855592,663056406,890682648, 1205069272] |