n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 13 |
4 | 56 |
5 | 286 |
6 | 2008 |
7 | 19749 |
8 | 280842 |
9 | 5762129 |
10 | 168873970 |
11 | 7023348917 |
12 | 412682000624 |
13 | 34188301513404 |
14 | 3992802803844526 |
15 | 656649238572375132 |
16 | 152278229304524217542 |
17 | 49749953321847000835094 |
[1,1,4,13,56,286,2008,19749,280842,5762129, 168873970,7023348917,412682000624,34188301513404, 3992802803844526,656649238572375132, 152278229304524217542,49749953321847000835094] |