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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 7 |
| 7 | 10 |
| 8 | 26 |
| 9 | 39 |
| 10 | 107 |
| 11 | 160 |
| 12 | 458 |
| 13 | 702 |
| 14 | 2058 |
| 15 | 3177 |
| 16 | 9498 |
| 17 | 14830 |
| 18 | 44947 |
| 19 | 70678 |
| 20 | 216598 |
| 21 | 342860 |
| 22 | 1059952 |
| 23 | 1686486 |
| 24 | 5251806 |
| 25 | 8393681 |
| 26 | 26297238 |
| 27 | 42187148 |
| 28 | 132856766 |
| 29 | 213828802 |
| 30 | 676398395 |
| 31 | 1091711076 |
[1,1,1,2,3,7,10,26,39,107,160,458,702,2058,3177, 9498,14830,44947,70678,216598,342860,1059952, 1686486,5251806,8393681,26297238,42187148, 132856766,213828802,676398395,1091711076] |