n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 6 |
5 | 14 |
6 | 31 |
7 | 70 |
8 | 157 |
9 | 353 |
10 | 793 |
11 | 1782 |
12 | 4004 |
13 | 8997 |
14 | 20216 |
15 | 45425 |
16 | 102069 |
17 | 229347 |
18 | 515338 |
19 | 1157954 |
20 | 2601899 |
21 | 5846414 |
22 | 13136773 |
23 | 29518061 |
24 | 66326481 |
25 | 149034250 |
26 | 334876920 |
27 | 752461609 |
28 | 1690765888 |
29 | 3799116465 |
30 | 8536537209 |
[0,1,1,3,6,14,31,70,157,353,793,1782,4004,8997, 20216,45425,102069,229347,515338,1157954,2601899, 5846414,13136773,29518061,66326481,149034250, 334876920,752461609,1690765888,3799116465, 8536537209] |