n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 11 |
5 | 41 |
6 | 146 |
7 | 564 |
8 | 2199 |
9 | 8835 |
10 | 35989 |
11 | 148912 |
12 | 623008 |
13 | 2633148 |
14 | 11222160 |
15 | 48181056 |
16 | 208180847 |
17 | 904593623 |
18 | 3950338043 |
19 | 17328256180 |
20 | 76316518987 |
21 | 337332601513 |
22 | 1495992837550 |
23 | 6654367576732 |
24 | 29681131861564 |
[1,1,4,11,41,146,564,2199,8835,35989,148912, 623008,2633148,11222160,48181056,208180847, 904593623,3950338043,17328256180,76316518987, 337332601513,1495992837550,6654367576732, 29681131861564] |