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| n | a(n) |
|---|---|
| 8 | 1 |
| 9 | 3 |
| 10 | 12 |
| 11 | 39 |
| 12 | 119 |
| 13 | 325 |
| 14 | 833 |
| 15 | 1972 |
| 16 | 4411 |
| 17 | 9318 |
| 18 | 18789 |
| 19 | 36248 |
| 20 | 67361 |
| 21 | 120868 |
| 22 | 210354 |
| 23 | 355873 |
| 24 | 587070 |
| 25 | 946127 |
| 26 | 1493015 |
| 27 | 2310430 |
| 28 | 3512236 |
| 29 | 5251416 |
| 30 | 7732998 |
| 31 | 11226380 |
| 32 | 16084556 |
| 33 | 22762426 |
| 34 | 31844621 |
| 35 | 44072033 |
| 36 | 60380915 |
| 37 | 81940412 |
[1,3,12,39,119,325,833,1972,4411,9318,18789,36248, 67361,120868,210354,355873,587070,946127,1493015, 2310430,3512236,5251416,7732998,11226380,16084556, 22762426,31844621,44072033,60380915,81940412] |