n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 13 |
3 | 95 |
4 | 298 |
5 | 1287 |
6 | 38908 |
7 | 156919 |
8 | 509665 |
9 | 3724574 |
10 | 11683387 |
11 | 50458122 |
12 | 1525427047 |
13 | 6152166310 |
14 | 19981925977 |
15 | 146025648149 |
16 | 458058870424 |
17 | 1978261129845 |
18 | 59805892765774 |
19 | 241201832192941 |
20 | 783411389344597 |
21 | 5725081557605120 |
22 | 17958656062159957 |
[1,4,13,95,298,1287,38908,156919,509665,3724574, 11683387,50458122,1525427047,6152166310, 19981925977,146025648149,458058870424, 1978261129845,59805892765774,241201832192941, 783411389344597,5725081557605120, 17958656062159957] |