n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 17 |
6 | 46 |
7 | 128 |
8 | 372 |
9 | 1109 |
10 | 3349 |
11 | 10221 |
12 | 31527 |
13 | 98178 |
14 | 308179 |
15 | 973911 |
16 | 3096044 |
17 | 9894393 |
18 | 31770247 |
19 | 102444145 |
20 | 331594081 |
21 | 1077022622 |
22 | 3509197080 |
23 | 11466710630 |
24 | 37567784437 |
25 | 123380796192 |
26 | 406120349756 |
27 | 1339571374103 |
[1,1,1,2,6,17,46,128,372,1109,3349,10221,31527, 98178,308179,973911,3096044,9894393,31770247, 102444145,331594081,1077022622,3509197080, 11466710630,37567784437,123380796192,406120349756, 1339571374103] |