n | a(n) |
---|---|
0 | 1 |
1 | -4 |
2 | 15 |
3 | -56 |
4 | 209 |
5 | -780 |
6 | 2911 |
7 | -10864 |
8 | 40545 |
9 | -151316 |
10 | 564719 |
11 | -2107560 |
12 | 7865521 |
13 | -29354524 |
14 | 109552575 |
15 | -408855776 |
16 | 1525870529 |
17 | -5694626340 |
18 | 21252634831 |
19 | -79315912984 |
20 | 296011017105 |
21 | -1104728155436 |
22 | 4122901604639 |
23 | -15386878263120 |
24 | 57424611447841 |
[1,-4,15,-56,209,-780,2911,-10864,40545,-151316, 564719,-2107560,7865521,-29354524,109552575, -408855776,1525870529,-5694626340,21252634831, -79315912984,296011017105,-1104728155436, 4122901604639,-15386878263120,57424611447841] |