n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 11 |
5 | 28 |
6 | 78 |
7 | 213 |
8 | 598 |
9 | 1670 |
10 | 4723 |
11 | 13356 |
12 | 37986 |
13 | 108193 |
14 | 309169 |
15 | 884923 |
16 | 2538369 |
17 | 7292170 |
18 | 20982220 |
19 | 60451567 |
20 | 174385063 |
21 | 503600439 |
22 | 1455827279 |
23 | 4212464112 |
24 | 12199373350 |
25 | 35357580112 |
26 | 102552754000 |
27 | 297651592188 |
28 | 864460682777 |
29 | 2512115979800 |
30 | 7304240074858 |
[1,2,4,11,28,78,213,598,1670,4723,13356,37986, 108193,309169,884923,2538369,7292170,20982220, 60451567,174385063,503600439,1455827279, 4212464112,12199373350,35357580112,102552754000, 297651592188,864460682777,2512115979800, 7304240074858] |