n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 12 |
5 | 33 |
6 | 91 |
7 | 264 |
8 | 780 |
9 | 2365 |
10 | 7274 |
11 | 22727 |
12 | 71784 |
13 | 229094 |
14 | 737215 |
15 | 2390072 |
16 | 7798020 |
17 | 25587218 |
18 | 84377881 |
19 | 279499063 |
20 | 929556155 |
21 | 3102767833 |
22 | 10390936382 |
23 | 34903331506 |
24 | 117564309276 |
25 | 396994228503 |
26 | 1343716120550 |
27 | 4557952756658 |
28 | 15491856887741 |
[1,1,2,5,12,33,91,264,780,2365,7274,22727,71784, 229094,737215,2390072,7798020,25587218,84377881, 279499063,929556155,3102767833,10390936382, 34903331506,117564309276,396994228503, 1343716120550,4557952756658,15491856887741] |