n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 17 |
4 | 49 |
5 | 141 |
6 | 406 |
7 | 1169 |
8 | 3366 |
9 | 9692 |
10 | 27907 |
11 | 80355 |
12 | 231373 |
13 | 666212 |
14 | 1918281 |
15 | 5523470 |
16 | 15904198 |
17 | 45794313 |
18 | 131859469 |
19 | 379674209 |
20 | 1093228314 |
21 | 3147825473 |
22 | 9063802210 |
23 | 26098178316 |
24 | 75146709475 |
25 | 216376326215 |
26 | 623030800329 |
[1,2,6,17,49,141,406,1169,3366,9692,27907,80355, 231373,666212,1918281,5523470,15904198,45794313, 131859469,379674209,1093228314,3147825473, 9063802210,26098178316,75146709475,216376326215, 623030800329] |