n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 8 |
4 | 31 |
5 | 87 |
6 | 323 |
7 | 1081 |
8 | 3973 |
9 | 14445 |
10 | 54212 |
11 | 204544 |
12 | 786923 |
13 | 3038695 |
14 | 11904138 |
15 | 46856916 |
16 | 185950943 |
17 | 742818757 |
18 | 2981832628 |
19 | 12038056472 |
20 | 48820715319 |
21 | 198765075087 |
22 | 812772546171 |
23 | 3334144388475 |
24 | 13723690769043 |
25 | 56666703823593 |
26 | 234592663532672 |
27 | 973902799859392 |
28 | 4052797675504189 |
[1,1,4,8,31,87,323,1081,3973,14445,54212,204544, 786923,3038695,11904138,46856916,185950943, 742818757,2981832628,12038056472,48820715319, 198765075087,812772546171,3334144388475, 13723690769043,56666703823593,234592663532672, 973902799859392,4052797675504189] |