n | a(n) |
---|---|
0 | 1 |
1 | 8 |
2 | 50 |
3 | 316 |
4 | 1996 |
5 | 12608 |
6 | 79640 |
7 | 503056 |
8 | 3177616 |
9 | 20071808 |
10 | 126786080 |
11 | 800860096 |
12 | 5058732736 |
13 | 31954116608 |
14 | 201842165120 |
15 | 1274961223936 |
16 | 8053451673856 |
17 | 50870632491008 |
18 | 321330698293760 |
19 | 2029725454744576 |
[1,8,50,316,1996,12608,79640,503056,3177616, 20071808,126786080,800860096,5058732736, 31954116608,201842165120,1274961223936, 8053451673856,50870632491008,321330698293760, 2029725454744576] |