n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 25 |
5 | 217 |
6 | 2470 |
7 | 35647 |
8 | 637129 |
9 | 13843948 |
10 | 360022957 |
11 | 11054457253 |
12 | 396003680518 |
13 | 16377463914091 |
14 | 774714094061221 |
15 | 41572230979229284 |
16 | 2512149910125036865 |
17 | 169831839578092130017 |
18 | 12769241823369505582150 |
19 | 1062122471116082751430087 |
20 | 97264621940872013476357969 |
[1,1,4,25,217,2470,35647,637129,13843948, 360022957,11054457253,396003680518,16377463914091, 774714094061221,41572230979229284, 2512149910125036865,169831839578092130017, 12769241823369505582150,1062122471116082751430087, 97264621940872013476357969] |