n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 14 |
4 | 62 |
5 | 272 |
6 | 1307 |
7 | 6178 |
8 | 28687 |
9 | 127074 |
10 | 534414 |
11 | 2125086 |
12 | 8003063 |
13 | 28603253 |
14 | 97334199 |
15 | 316359888 |
16 | 985253099 |
17 | 2948785272 |
18 | 8504664978 |
19 | 23695762074 |
20 | 63924853698 |
21 | 167320196102 |
22 | 425715789486 |
23 | 1054686008982 |
[1,1,4,14,62,272,1307,6178,28687,127074,534414, 2125086,8003063,28603253,97334199,316359888, 985253099,2948785272,8504664978,23695762074, 63924853698,167320196102,425715789486, 1054686008982] |