n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 8 |
5 | 24 |
6 | 75 |
7 | 243 |
8 | 808 |
9 | 2742 |
10 | 9458 |
11 | 33062 |
12 | 116868 |
13 | 417022 |
14 | 1500159 |
15 | 5434563 |
16 | 19808976 |
17 | 72596742 |
18 | 267343374 |
19 | 988779258 |
20 | 3671302176 |
21 | 13679542632 |
22 | 51134644014 |
23 | 191703766638 |
24 | 720629997168 |
25 | 2715610275804 |
26 | 10256844598900 |
27 | 38822029694628 |
28 | 147229736485868 |
[1,1,3,8,24,75,243,808,2742,9458,33062,116868, 417022,1500159,5434563,19808976,72596742, 267343374,988779258,3671302176,13679542632, 51134644014,191703766638,720629997168, 2715610275804,10256844598900,38822029694628, 147229736485868] |