n | a(n) |
---|---|
0 | 2 |
1 | 2 |
2 | 4 |
3 | 7 |
4 | 15 |
5 | 32 |
6 | 71 |
7 | 158 |
8 | 354 |
9 | 794 |
10 | 1783 |
11 | 4005 |
12 | 8998 |
13 | 20217 |
14 | 45426 |
15 | 102070 |
16 | 229348 |
17 | 515339 |
18 | 1157955 |
19 | 2601900 |
20 | 5846415 |
21 | 13136774 |
22 | 29518062 |
23 | 66326482 |
24 | 149034251 |
25 | 334876921 |
26 | 752461610 |
27 | 1690765889 |
28 | 3799116466 |
29 | 8536537210 |
30 | 19181424996 |
[2,2,4,7,15,32,71,158,354,794,1783,4005,8998, 20217,45426,102070,229348,515339,1157955,2601900, 5846415,13136774,29518062,66326482,149034251, 334876921,752461610,1690765889,3799116466, 8536537210,19181424996] |