n | a(n) |
---|---|
0 | 2 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 6 |
5 | 11 |
6 | 21 |
7 | 38 |
8 | 70 |
9 | 129 |
10 | 237 |
11 | 436 |
12 | 802 |
13 | 1475 |
14 | 2713 |
15 | 4990 |
16 | 9178 |
17 | 16881 |
18 | 31049 |
19 | 57108 |
20 | 105038 |
21 | 193195 |
22 | 355341 |
23 | 653574 |
24 | 1202110 |
25 | 2211025 |
26 | 4066709 |
27 | 7479844 |
28 | 13757578 |
29 | 25304131 |
30 | 46541553 |
31 | 85603262 |
32 | 157448946 |
33 | 289593761 |
[2,1,1,4,6,11,21,38,70,129,237,436,802,1475,2713, 4990,9178,16881,31049,57108,105038,193195,355341, 653574,1202110,2211025,4066709,7479844,13757578, 25304131,46541553,85603262,157448946,289593761] |