n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | 5 |
3 | 1 |
4 | 19 |
5 | 30 |
6 | 102 |
7 | 242 |
8 | 666 |
9 | 1718 |
10 | 4555 |
11 | 11937 |
12 | 31435 |
13 | 82615 |
14 | 217301 |
15 | 571372 |
16 | 1502572 |
17 | 3951188 |
18 | 10390340 |
19 | 27322972 |
20 | 71850149 |
21 | 188941251 |
22 | 496850977 |
23 | 1306548125 |
24 | 3435774983 |
25 | 9034913514 |
26 | 23758733842 |
27 | 62477347430 |
28 | 164294064510 |
29 | 432037221810 |
[1,-1,5,1,19,30,102,242,666,1718,4555,11937,31435, 82615,217301,571372,1502572,3951188,10390340, 27322972,71850149,188941251,496850977,1306548125, 3435774983,9034913514,23758733842,62477347430, 164294064510,432037221810] |