n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 3 |
4 | 8 |
5 | 20 |
6 | 47 |
7 | 105 |
8 | 224 |
9 | 456 |
10 | 881 |
11 | 1595 |
12 | 2632 |
13 | 3692 |
14 | 3359 |
15 | -2927 |
16 | -27776 |
17 | -103088 |
18 | -304607 |
19 | -803149 |
20 | -1966392 |
21 | -4549884 |
22 | -10029361 |
23 | -21114759 |
24 | -42375200 |
25 | -80491880 |
26 | -142437359 |
27 | -226667157 |
28 | -294543992 |
29 | -191015460 |
30 | 556551487 |
31 | 3216934945 |
[0,1,3,8,20,47,105,224,456,881,1595,2632,3692, 3359,-2927,-27776,-103088,-304607,-803149, -1966392,-4549884,-10029361,-21114759,-42375200, -80491880,-142437359,-226667157,-294543992, -191015460,556551487,3216934945] |