n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 36 |
5 | 260 |
6 | 2190 |
7 | 21882 |
8 | 268856 |
9 | 3907080 |
10 | 63977850 |
11 | 1152946190 |
12 | 22581979332 |
13 | 477140664156 |
14 | 10828556474918 |
15 | 263163922847490 |
16 | 6836792356168560 |
17 | 189694001088036752 |
18 | 5614994984290505586 |
19 | 176964200467784915094 |
20 | 5921022573291003915260 |
21 | 209568707084236321665060 |
[1,2,6,36,260,2190,21882,268856,3907080,63977850, 1152946190,22581979332,477140664156, 10828556474918,263163922847490,6836792356168560, 189694001088036752,5614994984290505586, 176964200467784915094,5921022573291003915260, 209568707084236321665060] |