n | a(n) |
---|---|
0 | 1 |
1 | -2 |
2 | -2 |
3 | -4 |
4 | -10 |
5 | -28 |
6 | -84 |
7 | -264 |
8 | -858 |
9 | -2860 |
10 | -9724 |
11 | -33592 |
12 | -117572 |
13 | -416024 |
14 | -1485800 |
15 | -5348880 |
16 | -19389690 |
17 | -70715340 |
18 | -259289580 |
19 | -955277400 |
20 | -3534526380 |
21 | -13128240840 |
22 | -48932534040 |
23 | -182965127280 |
24 | -686119227300 |
25 | -2579808294648 |
26 | -9723892802904 |
27 | -36734706144304 |
[1,-2,-2,-4,-10,-28,-84,-264,-858,-2860,-9724, -33592,-117572,-416024,-1485800,-5348880, -19389690,-70715340,-259289580,-955277400, -3534526380,-13128240840,-48932534040, -182965127280,-686119227300,-2579808294648, -9723892802904,-36734706144304] |