n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 15 |
5 | 40 |
6 | 103 |
7 | 266 |
8 | 683 |
9 | 1753 |
10 | 4481 |
11 | 11417 |
12 | 28993 |
13 | 73414 |
14 | 185424 |
15 | 467302 |
16 | 1175322 |
17 | 2950467 |
18 | 7393090 |
19 | 18492029 |
20 | 46173538 |
21 | 115102596 |
22 | 286482967 |
23 | 711990108 |
24 | 1767048214 |
25 | 4379814978 |
26 | 10842382074 |
27 | 26808912074 |
28 | 66212421302 |
29 | 163351562975 |
30 | 402575169429 |
31 | 991119918949 |
[1,1,2,6,15,40,103,266,683,1753,4481,11417,28993, 73414,185424,467302,1175322,2950467,7393090, 18492029,46173538,115102596,286482967,711990108, 1767048214,4379814978,10842382074,26808912074, 66212421302,163351562975,402575169429, 991119918949] |