n | a(n) |
---|---|
1 | 2 |
2 | 17 |
3 | 80 |
4 | 323 |
5 | 1214 |
6 | 4373 |
7 | 15308 |
8 | 52487 |
9 | 177146 |
10 | 590489 |
11 | 1948616 |
12 | 6377291 |
13 | 20726198 |
14 | 66961565 |
15 | 215233604 |
16 | 688747535 |
17 | 2195382770 |
18 | 6973568801 |
19 | 22082967872 |
20 | 69735688019 |
21 | 219667417262 |
22 | 690383311397 |
23 | 2165293113020 |
[2,17,80,323,1214,4373,15308,52487,177146,590489, 1948616,6377291,20726198,66961565,215233604, 688747535,2195382770,6973568801,22082967872, 69735688019,219667417262,690383311397, 2165293113020] |