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| n | a(n) |
|---|---|
| 5 | 10 |
| 6 | 60 |
| 7 | 245 |
| 8 | 840 |
| 9 | 2604 |
| 10 | 7560 |
| 11 | 20955 |
| 12 | 56100 |
| 13 | 146146 |
| 14 | 372372 |
| 15 | 931385 |
| 16 | 2293200 |
| 17 | 5569880 |
| 18 | 13368528 |
| 19 | 31751223 |
| 20 | 74709900 |
| 21 | 174324430 |
| 22 | 403700220 |
| 23 | 928512277 |
| 24 | 2122315800 |
| 25 | 4823447300 |
| 26 | 10905187800 |
| 27 | 24536675475 |
| 28 | 54962156340 |
| 29 | 122607890874 |
| 30 | 272461983780 |
| 31 | 603308682865 |
| 32 | 1331439856800 |
[10,60,245,840,2604,7560,20955,56100,146146, 372372,931385,2293200,5569880,13368528,31751223, 74709900,174324430,403700220,928512277,2122315800, 4823447300,10905187800,24536675475,54962156340, 122607890874,272461983780,603308682865, 1331439856800] |