n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 23 |
4 | 106 |
5 | 566 |
6 | 3415 |
7 | 22872 |
8 | 167796 |
9 | 1334596 |
10 | 11414192 |
11 | 104270906 |
12 | 1011793389 |
13 | 10379989930 |
14 | 112134625986 |
15 | 1271209859403 |
16 | 15077083642150 |
17 | 186588381229340 |
18 | 2403775013224000 |
19 | 32168379148440968 |
20 | 446341838086450308 |
21 | 6410107231501731012 |
22 | 95136428354649665256 |
[1,2,6,23,106,566,3415,22872,167796,1334596, 11414192,104270906,1011793389,10379989930, 112134625986,1271209859403,15077083642150, 186588381229340,2403775013224000, 32168379148440968,446341838086450308, 6410107231501731012,95136428354649665256] |