n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 18 |
5 | 58 |
6 | 186 |
7 | 614 |
8 | 2034 |
9 | 6818 |
10 | 22970 |
11 | 77858 |
12 | 264970 |
13 | 905294 |
14 | 3102434 |
15 | 10661370 |
16 | 36722642 |
17 | 126752218 |
18 | 438294018 |
19 | 1518032598 |
20 | 5265341314 |
21 | 18286911130 |
22 | 63586988434 |
23 | 221342104842 |
24 | 771235606050 |
25 | 2689688538646 |
26 | 9388096331642 |
[1,2,6,18,58,186,614,2034,6818,22970,77858,264970, 905294,3102434,10661370,36722642,126752218, 438294018,1518032598,5265341314,18286911130, 63586988434,221342104842,771235606050, 2689688538646,9388096331642] |