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| n | a(n) |
|---|---|
| 6 | 1 |
| 7 | 12 |
| 8 | 124 |
| 9 | 1186 |
| 10 | 11310 |
| 11 | 104212 |
| 12 | 960768 |
| 13 | 8881520 |
| 14 | 83243786 |
| 15 | 792762774 |
| 16 | 7693204534 |
| 17 | 76057329258 |
| 18 | 765792782624 |
| 19 | 7847188907046 |
| 20 | 81815091467488 |
| 21 | 867767607899554 |
| 22 | 9363465279720294 |
| 23 | 102791356120285178 |
| 24 | 1148111902688701322 |
| 25 | 13046567129596851746 |
| 26 | 150810085730131941438 |
[1,12,124,1186,11310,104212,960768,8881520, 83243786,792762774,7693204534,76057329258, 765792782624,7847188907046,81815091467488, 867767607899554,9363465279720294, 102791356120285178,1148111902688701322, 13046567129596851746,150810085730131941438] |