The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 120960 |
| 1 | 4682880 |
| 2 | 54268416 |
| 3 | 364571136 |
| 4 | 1758756096 |
| 5 | 6759726336 |
| 6 | 21978671616 |
| 7 | 62815154688 |
| 8 | 161990345088 |
| 9 | 384087420288 |
| 10 | 849090198528 |
| 11 | 1768911326208 |
| 12 | 3502103394816 |
| 13 | 6633368787456 |
| 14 | 12086145432576 |
| 15 | 21278464551936 |
| 16 | 36334471510656 |
| 17 | 60366490588800 |
[120960,4682880,54268416,364571136,1758756096, 6759726336,21978671616,62815154688,161990345088, 384087420288,849090198528,1768911326208, 3502103394816,6633368787456,12086145432576, 21278464551936,36334471510656,60366490588800] |