n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 39 |
6 | 109 |
7 | 312 |
8 | 890 |
9 | 2552 |
10 | 7325 |
11 | 21047 |
12 | 60465 |
13 | 173750 |
14 | 499068 |
15 | 1433071 |
16 | 4113105 |
17 | 11799780 |
18 | 33834367 |
19 | 96968462 |
20 | 277771344 |
21 | 795310628 |
22 | 2276055442 |
23 | 6510786627 |
24 | 18616389094 |
25 | 53207964655 |
26 | 152014267327 |
27 | 434136228215 |
[0,1,2,5,14,39,109,312,890,2552,7325,21047,60465, 173750,499068,1433071,4113105,11799780,33834367, 96968462,277771344,795310628,2276055442, 6510786627,18616389094,53207964655,152014267327, 434136228215] |