n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 40 |
6 | 128 |
7 | 369 |
8 | 1214 |
9 | 3516 |
10 | 12776 |
11 | 40534 |
12 | 137404 |
13 | 463232 |
14 | 1602348 |
15 | 5216253 |
16 | 17753898 |
17 | 58597316 |
18 | 212150928 |
19 | 710453534 |
20 | 2366853608 |
21 | 8584498376 |
22 | 30026959300 |
23 | 100396304016 |
24 | 333997297900 |
25 | 1157269900344 |
26 | 3852364562536 |
27 | 13917848281928 |
28 | 45618032373712 |
[1,1,2,5,14,40,128,369,1214,3516,12776,40534, 137404,463232,1602348,5216253,17753898,58597316, 212150928,710453534,2366853608,8584498376, 30026959300,100396304016,333997297900, 1157269900344,3852364562536,13917848281928, 45618032373712] |