n | a(n) |
---|---|
0 | 0 |
1 | -1 |
2 | 6 |
3 | -15 |
4 | 34 |
5 | -57 |
6 | 102 |
7 | -139 |
8 | 234 |
9 | -261 |
10 | 478 |
11 | -375 |
12 | 978 |
13 | -241 |
14 | 2262 |
15 | 1149 |
16 | 6394 |
17 | 7875 |
18 | 21582 |
19 | 36305 |
20 | 80610 |
21 | 151959 |
22 | 314566 |
23 | 616965 |
24 | 1247754 |
25 | 2479883 |
26 | 4977342 |
27 | 9935001 |
28 | 19891954 |
29 | 39759519 |
30 | 79546038 |
31 | 159062285 |
[0,-1,6,-15,34,-57,102,-139,234,-261,478,-375,978, -241,2262,1149,6394,7875,21582,36305,80610,151959, 314566,616965,1247754,2479883,4977342,9935001, 19891954,39759519,79546038,159062285] |