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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 9 |
| 4 | 24 |
| 5 | 88 |
| 6 | 254 |
| 7 | 1064 |
| 8 | 1644 |
| 9 | 3382 |
| 10 | 4156 |
| 11 | 8022 |
| 12 | 26264 |
| 13 | 52012 |
| 14 | 25434 |
| 15 | 8506 |
| 16 | 5632 |
| 17 | 6224 |
| 18 | 12330 |
| 19 | 34224 |
| 20 | 108854 |
| 21 | 103156 |
| 22 | 75992 |
| 23 | 86560 |
| 24 | 69084 |
[1,1,3,9,24,88,254,1064,1644,3382,4156,8022,26264, 52012,25434,8506,5632,6224,12330,34224,108854, 103156,75992,86560,69084] |