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| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | 1 |
| 7 | 5 |
| 8 | 10 |
| 9 | 34 |
| 10 | 82 |
| 11 | 240 |
| 12 | 630 |
| 13 | 1764 |
| 14 | 4752 |
| 15 | 13108 |
| 16 | 35703 |
| 17 | 98108 |
| 18 | 268553 |
| 19 | 737864 |
| 20 | 2025779 |
| 21 | 5572160 |
| 22 | 15331017 |
| 23 | 42230755 |
| 24 | 116395955 |
| 25 | 321089489 |
| 26 | 886320404 |
| 27 | 2448312482 |
| 28 | 6767186801 |
| 29 | 18716207007 |
| 30 | 51792971141 |
| 31 | 143403624284 |
| 32 | 397254931272 |
| 33 | 1101003729796 |
| 34 | 3052855074597 |
[1,1,5,10,34,82,240,630,1764,4752,13108,35703, 98108,268553,737864,2025779,5572160,15331017, 42230755,116395955,321089489,886320404,2448312482, 6767186801,18716207007,51792971141,143403624284, 397254931272,1101003729796,3052855074597] |