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| n | a(n) |
|---|---|
| 13 | 14 |
| 14 | 225 |
| 15 | 1920 |
| 16 | 11560 |
| 17 | 55080 |
| 18 | 220932 |
| 19 | 775200 |
| 20 | 2441880 |
| 21 | 7034940 |
| 22 | 18795370 |
| 23 | 47070144 |
| 24 | 111435000 |
| 25 | 251100200 |
| 26 | 541574100 |
| 27 | 1123264800 |
| 28 | 2249204040 |
| 29 | 4362680250 |
| 30 | 8220658275 |
| 31 | 15085939200 |
| 32 | 27020703600 |
| 33 | 47327171760 |
| 34 | 81198579000 |
| 35 | 136666699200 |
| 36 | 225962211600 |
| 37 | 367443055800 |
[14,225,1920,11560,55080,220932,775200,2441880, 7034940,18795370,47070144,111435000,251100200, 541574100,1123264800,2249204040,4362680250, 8220658275,15085939200,27020703600,47327171760, 81198579000,136666699200,225962211600, 367443055800] |