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| n | a(n) |
|---|---|
| 7 | 1 |
| 8 | 1 |
| 9 | 5 |
| 10 | 21 |
| 11 | 80 |
| 12 | 285 |
| 13 | 970 |
| 14 | 3192 |
| 15 | 10236 |
| 16 | 32197 |
| 17 | 99743 |
| 18 | 305276 |
| 19 | 925342 |
| 20 | 2783012 |
| 21 | 8316994 |
| 22 | 24726109 |
| 23 | 73195582 |
| 24 | 215911767 |
| 25 | 635028054 |
| 26 | 1863156727 |
| 27 | 5455350409 |
| 28 | 15946267328 |
| 29 | 46545783253 |
| 30 | 135702643984 |
| 31 | 395246786050 |
| 32 | 1150250414764 |
| 33 | 3345193851398 |
| 34 | 9723141517918 |
[1,1,5,21,80,285,970,3192,10236,32197,99743, 305276,925342,2783012,8316994,24726109,73195582, 215911767,635028054,1863156727,5455350409, 15946267328,46545783253,135702643984,395246786050, 1150250414764,3345193851398,9723141517918] |