n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 21 |
5 | 51 |
6 | 201 |
7 | 498 |
8 | 2241 |
9 | 4581 |
10 | 26991 |
11 | 17766 |
12 | 359613 |
13 | -995409 |
14 | 6968781 |
15 | -53627454 |
16 | 259953921 |
17 | -2292378327 |
18 | 13839388731 |
19 | -108459180954 |
20 | 809434284741 |
21 | -6158416812309 |
22 | 50614251147153 |
23 | -407335408369614 |
24 | 3478999597913601 |
25 | -30042633320442099 |
26 | 266107969086122151 |
[1,1,3,6,21,51,201,498,2241,4581,26991,17766, 359613,-995409,6968781,-53627454,259953921, -2292378327,13839388731,-108459180954, 809434284741,-6158416812309,50614251147153, -407335408369614,3478999597913601, -30042633320442099,266107969086122151] |