n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 74 |
4 | 392 |
5 | 2116 |
6 | 11652 |
7 | 64967 |
8 | 365759 |
9 | 2074574 |
10 | 11836868 |
11 | 67863126 |
12 | 390625864 |
13 | 2256008404 |
14 | 13066434500 |
15 | 75864388248 |
16 | 441412162944 |
17 | 2573133492918 |
18 | 15024422196084 |
19 | 87856077334712 |
20 | 514419919265976 |
21 | 3015635977208784 |
22 | 17697278566338720 |
23 | 103958103858046662 |
24 | 611220388506542904 |
[1,3,15,74,392,2116,11652,64967,365759,2074574, 11836868,67863126,390625864,2256008404, 13066434500,75864388248,441412162944, 2573133492918,15024422196084,87856077334712, 514419919265976,3015635977208784, 17697278566338720,103958103858046662, 611220388506542904] |