n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 12 |
5 | 60 |
6 | 346 |
7 | 2218 |
8 | 15444 |
9 | 115075 |
10 | 908155 |
11 | 7535185 |
12 | 65374018 |
13 | 590579575 |
14 | 5537249212 |
15 | 53742567000 |
16 | 538801229874 |
17 | 5570060420573 |
18 | 59288164937748 |
19 | 648934780013375 |
20 | 7295904025820975 |
21 | 84174136470742517 |
22 | 995682428049720830 |
[1,1,3,12,60,346,2218,15444,115075,908155,7535185, 65374018,590579575,5537249212,53742567000, 538801229874,5570060420573,59288164937748, 648934780013375,7295904025820975, 84174136470742517,995682428049720830] |