n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 19 |
5 | 63 |
6 | 216 |
7 | 760 |
8 | 2725 |
9 | 9910 |
10 | 36446 |
11 | 135268 |
12 | 505861 |
13 | 1903890 |
14 | 7204874 |
15 | 27394666 |
16 | 104592937 |
17 | 400795844 |
18 | 1540820542 |
19 | 5940738676 |
20 | 22964779660 |
21 | 88983512783 |
22 | 345532572678 |
23 | 1344372335524 |
24 | 5239988770268 |
25 | 20457802016011 |
26 | 79992676367108 |
27 | 313224032098244 |
28 | 1228088671826973 |
[1,1,2,6,19,63,216,760,2725,9910,36446,135268, 505861,1903890,7204874,27394666,104592937, 400795844,1540820542,5940738676,22964779660, 88983512783,345532572678,1344372335524, 5239988770268,20457802016011,79992676367108, 313224032098244,1228088671826973] |