n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 7 |
3 | 20 |
4 | 55 |
5 | 151 |
6 | 414 |
7 | 1133 |
8 | 3099 |
9 | 8472 |
10 | 23155 |
11 | 63275 |
12 | 172894 |
13 | 472393 |
14 | 1290663 |
15 | 3526256 |
16 | 9634071 |
17 | 26321031 |
18 | 71910814 |
19 | 196464677 |
20 | 536752579 |
21 | 1466437096 |
22 | 4006383531 |
23 | 10945648019 |
24 | 29904074046 |
25 | 81699461841 |
26 | 223207100431 |
27 | 609813170912 |
28 | 1666040617711 |
29 | 4551707698639 |
[1,3,7,20,55,151,414,1133,3099,8472,23155,63275, 172894,472393,1290663,3526256,9634071,26321031, 71910814,196464677,536752579,1466437096, 4006383531,10945648019,29904074046,81699461841, 223207100431,609813170912,1666040617711, 4551707698639] |