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| n | a(n) |
|---|---|
| 8 | 0 |
| 9 | 1 |
| 10 | 1 |
| 11 | 3 |
| 12 | 8 |
| 13 | 22 |
| 14 | 60 |
| 15 | 167 |
| 16 | 465 |
| 17 | 1307 |
| 18 | 3682 |
| 19 | 10422 |
| 20 | 29593 |
| 21 | 84291 |
| 22 | 240663 |
| 23 | 688685 |
| 24 | 1974519 |
| 25 | 5670969 |
| 26 | 16312391 |
| 27 | 46987389 |
| 28 | 135514781 |
| 29 | 391278211 |
| 30 | 1130924824 |
| 31 | 3271850658 |
| 32 | 9473951229 |
| 33 | 27454745755 |
| 34 | 79620703854 |
| 35 | 231064697016 |
| 36 | 670994912068 |
| 37 | 1949683485967 |
| 38 | 5668279789793 |
[0,1,1,3,8,22,60,167,465,1307,3682,10422,29593, 84291,240663,688685,1974519,5670969,16312391, 46987389,135514781,391278211,1130924824, 3271850658,9473951229,27454745755,79620703854, 231064697016,670994912068,1949683485967, 5668279789793] |