n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | 4 |
3 | -15 |
4 | 36 |
5 | -119 |
6 | 302 |
7 | -911 |
8 | 2440 |
9 | -7199 |
10 | 20186 |
11 | -60359 |
12 | 177204 |
13 | -546615 |
14 | 1683286 |
15 | -5401759 |
16 | 17456128 |
17 | -58447151 |
18 | 197925490 |
19 | -691264279 |
20 | 2446636396 |
21 | -8897012871 |
22 | 32811147054 |
23 | -123933345455 |
24 | 474792813176 |
25 | -1858243857599 |
26 | 7375013350282 |
27 | -29840434526951 |
[1,-1,4,-15,36,-119,302,-911,2440,-7199,20186, -60359,177204,-546615,1683286,-5401759,17456128, -58447151,197925490,-691264279,2446636396, -8897012871,32811147054,-123933345455, 474792813176,-1858243857599,7375013350282, -29840434526951] |