n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 21 |
6 | 59 |
7 | 162 |
8 | 483 |
9 | 1453 |
10 | 4492 |
11 | 14048 |
12 | 44616 |
13 | 142936 |
14 | 462380 |
15 | 1506534 |
16 | 4941955 |
17 | 16303783 |
18 | 54066560 |
19 | 180111432 |
20 | 602481589 |
21 | 2022797529 |
22 | 6814336663 |
23 | 23026359634 |
24 | 78027238290 |
25 | 265085903996 |
26 | 902733374480 |
27 | 3080967048004 |
28 | 10536594982790 |
29 | 36102498293396 |
30 | 123920278459564 |
[1,2,4,9,21,59,162,483,1453,4492,14048,44616, 142936,462380,1506534,4941955,16303783,54066560, 180111432,602481589,2022797529,6814336663, 23026359634,78027238290,265085903996,902733374480, 3080967048004,10536594982790,36102498293396, 123920278459564] |