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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 2 |
| 5 | 2 |
| 6 | 5 |
| 7 | 8 |
| 8 | 25 |
| 9 | 29 |
| 10 | 98 |
| 11 | 189 |
| 12 | 554 |
| 13 | 1136 |
| 14 | 3243 |
| 15 | 7008 |
| 16 | 19592 |
| 17 | 45249 |
| 18 | 122606 |
| 19 | 294165 |
| 20 | 792112 |
| 21 | 1954846 |
| 22 | 5225025 |
| 23 | 13231501 |
| 24 | 35199804 |
| 25 | 90471850 |
| 26 | 240660287 |
| 27 | 624850650 |
| 28 | 1661864454 |
| 29 | 4351560901 |
| 30 | 11579823213 |
[0,2,2,5,8,25,29,98,189,554,1136,3243,7008,19592, 45249,122606,294165,792112,1954846,5225025, 13231501,35199804,90471850,240660287,624850650, 1661864454,4351560901,11579823213] |