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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 2 |
| 7 | 9 |
| 8 | 20 |
| 9 | 20 |
| 10 | 9 |
| 11 | 44 |
| 12 | 272 |
| 13 | 448 |
| 14 | 272 |
| 15 | 44 |
| 16 | 265 |
| 17 | 6032 |
| 18 | 25904 |
| 19 | 25904 |
| 20 | 6032 |
| 21 | 265 |
| 22 | 1854 |
| 23 | 205312 |
| 24 | 2952608 |
| 25 | 7114752 |
| 26 | 2952608 |
| 27 | 205312 |
| 28 | 1854 |
| 29 | 14833 |
| 30 | 9672448 |
| 31 | 596917696 |
| 32 | 4566151168 |
| 33 | 4566151168 |
| 34 | 596917696 |
| 35 | 9672448 |
| 36 | 14833 |
| 37 | 133496 |
| 38 | 601903360 |
[0,1,1,2,4,2,9,20,20,9,44,272,448,272,44,265,6032, 25904,25904,6032,265,1854,205312,2952608,7114752, 2952608,205312,1854,14833,9672448,596917696, 4566151168,4566151168,596917696,9672448,14833, 133496,601903360] |