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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 700 |
| 3 | 12440 |
| 4 | 96884 |
| 5 | 438968 |
| 6 | 1504820 |
| 7 | 4141212 |
| 8 | 9922424 |
| 9 | 21253088 |
| 10 | 41894660 |
| 11 | 76920336 |
| 12 | 133925952 |
| 13 | 222142748 |
| 14 | 354645912 |
| 15 | 547265784 |
| 16 | 820450936 |
| 17 | 1198350296 |
| 18 | 1712627752 |
| 19 | 2397846536 |
| 20 | 3298959016 |
| 21 | 4465613072 |
| 22 | 5958544292 |
| 23 | 7844423744 |
[0,700,12440,96884,438968,1504820,4141212,9922424, 21253088,41894660,76920336,133925952,222142748, 354645912,547265784,820450936,1198350296, 1712627752,2397846536,3298959016,4465613072, 5958544292,7844423744] |