n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 74 |
7 | 218 |
8 | 668 |
9 | 2096 |
10 | 6726 |
11 | 21946 |
12 | 72666 |
13 | 243504 |
14 | 824528 |
15 | 2816854 |
16 | 9698520 |
17 | 33620626 |
18 | 117254340 |
19 | 411135452 |
20 | 1448544666 |
21 | 5125796448 |
22 | 18209367238 |
23 | 64919822556 |
24 | 232206203152 |
25 | 833040115596 |
26 | 2996741699470 |
27 | 10807658186756 |
28 | 39068847237770 |
[1,1,2,4,10,26,74,218,668,2096,6726,21946,72666, 243504,824528,2816854,9698520,33620626,117254340, 411135452,1448544666,5125796448,18209367238, 64919822556,232206203152,833040115596, 2996741699470,10807658186756,39068847237770] |