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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 193 |
| 4 | 1548 |
| 5 | 6714 |
| 6 | 21280 |
| 7 | 55395 |
| 8 | 125748 |
| 9 | 257908 |
| 10 | 489024 |
| 11 | 870885 |
| 12 | 1473340 |
| 13 | 2388078 |
| 14 | 3732768 |
| 15 | 5655559 |
| 16 | 8339940 |
| 17 | 12009960 |
| 18 | 16935808 |
| 19 | 23439753 |
| 20 | 31902444 |
| 21 | 42769570 |
| 22 | 56558880 |
| 23 | 73867563 |
| 24 | 95379988 |
| 25 | 121875804 |
| 26 | 154238400 |
| 27 | 193463725 |
| 28 | 240669468 |
| 29 | 297104598 |
| 30 | 364159264 |
[0,0,0,193,1548,6714,21280,55395,125748,257908, 489024,870885,1473340,2388078,3732768,5655559, 8339940,12009960,16935808,23439753,31902444, 42769570,56558880,73867563,95379988,121875804, 154238400,193463725,240669468,297104598,364159264] |