n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 76 |
6 | 271 |
7 | 938 |
8 | 3146 |
9 | 10252 |
10 | 32583 |
11 | 101368 |
12 | 309697 |
13 | 931708 |
14 | 2766374 |
15 | 8121630 |
16 | 23612985 |
17 | 68076148 |
18 | 194824915 |
19 | 553979438 |
20 | 1566301826 |
21 | 4406286736 |
22 | 12340335627 |
23 | 34422720496 |
24 | 95676632581 |
25 | 265071811456 |
26 | 732238423646 |
27 | 2017390937058 |
28 | 5544712079421 |
29 | 15205817438572 |
[1,1,2,6,21,76,271,938,3146,10252,32583,101368, 309697,931708,2766374,8121630,23612985,68076148, 194824915,553979438,1566301826,4406286736, 12340335627,34422720496,95676632581,265071811456, 732238423646,2017390937058,5544712079421, 15205817438572] |