n | a(n) |
---|---|
1 | 0 |
2 | 8 |
3 | 0 |
4 | 90 |
5 | 204 |
6 | 1297 |
7 | 4608 |
8 | 23159 |
9 | 92312 |
10 | 425249 |
11 | 1799292 |
12 | 7982268 |
13 | 34469356 |
14 | 151243634 |
15 | 657198136 |
16 | 2872557590 |
17 | 12512098304 |
18 | 54609983231 |
19 | 238067509008 |
20 | 1038559461306 |
21 | 4528789386340 |
22 | 19753331212394 |
23 | 86145964341528 |
[0,8,0,90,204,1297,4608,23159,92312,425249, 1799292,7982268,34469356,151243634,657198136, 2872557590,12512098304,54609983231,238067509008, 1038559461306,4528789386340,19753331212394, 86145964341528] |