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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 1 |
| 5 | 4 |
| 6 | 3 |
| 7 | 13 |
| 8 | 26 |
| 9 | 23 |
| 10 | 119 |
| 11 | 235 |
| 12 | 452 |
| 13 | 1323 |
| 14 | 3119 |
| 15 | 7328 |
| 16 | 19372 |
| 17 | 46983 |
| 18 | 119070 |
| 19 | 303686 |
| 20 | 769310 |
| 21 | 1975420 |
| 22 | 5113550 |
| 23 | 13189920 |
| 24 | 34395096 |
| 25 | 89652338 |
| 26 | 234687224 |
| 27 | 615882224 |
| 28 | 1620322823 |
| 29 | 4269645213 |
| 30 | 11281746619 |
| 31 | 29843058869 |
[0,1,4,3,13,26,23,119,235,452,1323,3119,7328, 19372,46983,119070,303686,769310,1975420,5113550, 13189920,34395096,89652338,234687224,615882224, 1620322823,4269645213,11281746619,29843058869] |