n | a(n) |
---|---|
1 | 1 |
2 | 22 |
3 | 132 |
4 | 1006 |
5 | 4324 |
6 | 26996 |
7 | 109722 |
8 | 602804 |
9 | 2434670 |
10 | 12287118 |
11 | 49852352 |
12 | 237425498 |
13 | 969300694 |
14 | 4434629912 |
15 | 18203944458 |
16 | 80978858522 |
17 | 333840165288 |
18 | 1456084764388 |
19 | 6021921661718 |
20 | 25904211802080 |
[1,22,132,1006,4324,26996,109722,602804,2434670, 12287118,49852352,237425498,969300694,4434629912, 18203944458,80978858522,333840165288, 1456084764388,6021921661718,25904211802080] |