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| n | a(n) |
|---|---|
| 7 | 1 |
| 8 | 14 |
| 9 | 119 |
| 10 | 756 |
| 11 | 3969 |
| 12 | 18102 |
| 13 | 74102 |
| 14 | 278161 |
| 15 | 972447 |
| 16 | 3202521 |
| 17 | 10022705 |
| 18 | 30013914 |
| 19 | 86475340 |
| 20 | 240787680 |
| 21 | 650356936 |
| 22 | 1709167922 |
| 23 | 4381936874 |
| 24 | 10984062425 |
| 25 | 26971690900 |
| 26 | 64986689201 |
| 27 | 153866265007 |
| 28 | 358443604177 |
| 29 | 822523519244 |
| 30 | 1861072144260 |
| 31 | 4155817046514 |
[1,14,119,756,3969,18102,74102,278161,972447, 3202521,10022705,30013914,86475340,240787680, 650356936,1709167922,4381936874,10984062425, 26971690900,64986689201,153866265007,358443604177, 822523519244,1861072144260,4155817046514] |