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| n | a(n) |
|---|---|
| 1 | 298 |
| 2 | 7132 |
| 3 | 73204 |
| 4 | 740616 |
| 5 | 3996816 |
| 6 | 17477172 |
| 7 | 63142432 |
| 8 | 194636612 |
| 9 | 528526458 |
| 10 | 1310146892 |
| 11 | 2974170600 |
| 12 | 6332136700 |
| 13 | 12731677772 |
| 14 | 24341338640 |
| 15 | 44558190142 |
| 16 | 78679898026 |
| 17 | 134198692616 |
| 18 | 222298159666 |
| 19 | 358597980904 |
| 20 | 564781557470 |
[298,7132,73204,740616,3996816,17477172,63142432, 194636612,528526458,1310146892,2974170600, 6332136700,12731677772,24341338640,44558190142, 78679898026,134198692616,222298159666, 358597980904,564781557470] |