n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 28 |
5 | 146 |
6 | 1160 |
7 | 6805 |
8 | 38560 |
9 | 248861 |
10 | 1376999 |
11 | 7346823 |
12 | 40066933 |
13 | 205138785 |
14 | 1021202011 |
15 | 5016967826 |
16 | 23832660309 |
17 | 110581697393 |
18 | 503553260431 |
19 | 2240165792600 |
20 | 9769058509321 |
21 | 41836840405957 |
22 | 175853358107466 |
[1,1,3,28,146,1160,6805,38560,248861,1376999, 7346823,40066933,205138785,1021202011,5016967826, 23832660309,110581697393,503553260431, 2240165792600,9769058509321,41836840405957, 175853358107466] |