n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 76 |
7 | 232 |
8 | 764 |
9 | 2620 |
10 | 9496 |
11 | 35696 |
12 | 140152 |
13 | 568503 |
14 | 2390466 |
15 | 10349340 |
16 | 46204720 |
17 | 211779200 |
18 | 997134592 |
19 | 4808141824 |
20 | 23745792032 |
21 | 119848119307 |
22 | 618058083314 |
23 | 3251373425356 |
24 | 17442275104496 |
25 | 95297400355320 |
26 | 530067682582320 |
27 | 2998503402985440 |
[1,1,2,4,10,26,76,232,764,2620,9496,35696,140152, 568503,2390466,10349340,46204720,211779200, 997134592,4808141824,23745792032,119848119307, 618058083314,3251373425356,17442275104496, 95297400355320,530067682582320,2998503402985440] |