n | a(n) |
---|---|
2 | 1 |
3 | 4 |
4 | 18 |
5 | 74 |
6 | 311 |
7 | 1296 |
8 | 5432 |
9 | 22796 |
10 | 95958 |
11 | 404812 |
12 | 1711600 |
13 | 7250970 |
14 | 30772989 |
15 | 130810512 |
16 | 556867224 |
17 | 2373764416 |
18 | 10130935783 |
19 | 43285462884 |
20 | 185129287262 |
21 | 792525473552 |
22 | 3395664830670 |
23 | 14560682746632 |
24 | 62482560679368 |
25 | 268307898599664 |
26 | 1152883194581155 |
27 | 4956738399534376 |
28 | 21323028570642414 |
29 | 91775945084805898 |
[1,4,18,74,311,1296,5432,22796,95958,404812, 1711600,7250970,30772989,130810512,556867224, 2373764416,10130935783,43285462884,185129287262, 792525473552,3395664830670,14560682746632, 62482560679368,268307898599664,1152883194581155, 4956738399534376,21323028570642414, 91775945084805898] |