n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 28 |
4 | 274 |
5 | 3400 |
6 | 50734 |
7 | 880312 |
8 | 17357736 |
9 | 382463824 |
10 | 9298086490 |
11 | 246914949376 |
12 | 7104423326356 |
13 | 220000621675912 |
14 | 7290852811359654 |
15 | 257332393857067720 |
16 | 9632914084301343304 |
17 | 381050245422453157408 |
[1,4,28,274,3400,50734,880312,17357736,382463824, 9298086490,246914949376,7104423326356, 220000621675912,7290852811359654, 257332393857067720,9632914084301343304, 381050245422453157408] |