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| n | a(n) |
|---|---|
| 6 | 0 |
| 7 | 1 |
| 8 | 127 |
| 9 | 3025 |
| 10 | 34105 |
| 11 | 246730 |
| 12 | 1323652 |
| 13 | 5715424 |
| 14 | 20912320 |
| 15 | 67128490 |
| 16 | 193754990 |
| 17 | 512060978 |
| 18 | 1256328866 |
| 19 | 2892439160 |
| 20 | 6302524580 |
| 21 | 13087462580 |
| 22 | 26046574004 |
| 23 | 49916988803 |
| 24 | 92484925445 |
| 25 | 166218969675 |
| 26 | 290622864675 |
| 27 | 495564056130 |
| 28 | 825906183960 |
| 29 | 1347860993700 |
[0,1,127,3025,34105,246730,1323652,5715424, 20912320,67128490,193754990,512060978,1256328866, 2892439160,6302524580,13087462580,26046574004, 49916988803,92484925445,166218969675,290622864675, 495564056130,825906183960,1347860993700] |