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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 76 |
| 10 | 4788 |
| 11 | 221917 |
| 12 | 8887710 |
| 13 | 331432067 |
| 14 | 12269388935 |
| 15 | 460168784128 |
| 16 | 17665933357441 |
| 17 | 698638441294365 |
| 18 | 28556568958525122 |
| 19 | 1208570048233111199 |
| 20 | 53007713800631794460 |
| 21 | 2410148120774836584364 |
| 22 | 113594056221675357350279 |
| 23 | 5547970208256475164372741 |
[1,0,0,0,0,0,0,0,1,76,4788,221917,8887710, 331432067,12269388935,460168784128,17665933357441, 698638441294365,28556568958525122, 1208570048233111199,53007713800631794460, 2410148120774836584364,113594056221675357350279, 5547970208256475164372741] |