n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 20 |
6 | 46 |
7 | 106 |
8 | 248 |
9 | 582 |
10 | 1376 |
11 | 3264 |
12 | 7777 |
13 | 18581 |
14 | 44526 |
15 | 106936 |
16 | 257379 |
17 | 620577 |
18 | 1498788 |
19 | 3625026 |
20 | 8779271 |
21 | 21287278 |
22 | 51671864 |
23 | 125550018 |
24 | 305333281 |
25 | 743179460 |
26 | 1810290446 |
27 | 4412783988 |
28 | 10763786019 |
29 | 26271534125 |
30 | 64158771500 |
31 | 156769178340 |
[1,1,2,4,9,20,46,106,248,582,1376,3264,7777,18581, 44526,106936,257379,620577,1498788,3625026, 8779271,21287278,51671864,125550018,305333281, 743179460,1810290446,4412783988,10763786019, 26271534125,64158771500,156769178340] |