n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 5 |
3 | 20 |
4 | 101 |
5 | 572 |
6 | 3470 |
7 | 22040 |
8 | 144669 |
9 | 973356 |
10 | 6676186 |
11 | 46503080 |
12 | 328034226 |
13 | 2338460056 |
14 | 16819478972 |
15 | 121903180848 |
16 | 889396747869 |
17 | 6526715628492 |
18 | 48141140144546 |
19 | 356708675726088 |
20 | 2653863473928870 |
21 | 19816831149068360 |
22 | 148466651633265540 |
23 | 1115659552758534480 |
[1,3,5,20,101,572,3470,22040,144669,973356, 6676186,46503080,328034226,2338460056,16819478972, 121903180848,889396747869,6526715628492, 48141140144546,356708675726088,2653863473928870, 19816831149068360,148466651633265540, 1115659552758534480] |