n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 12 |
3 | 62 |
4 | 342 |
5 | 1932 |
6 | 11094 |
7 | 64480 |
8 | 378150 |
9 | 2233304 |
10 | 13263772 |
11 | 79136844 |
12 | 473969586 |
13 | 2847911596 |
14 | 17159547804 |
15 | 103640073972 |
16 | 627280131594 |
17 | 3803643145596 |
18 | 23102172930156 |
19 | 140522319418164 |
20 | 855880464524472 |
21 | 5219168576004184 |
22 | 31861229045809436 |
[1,2,12,62,342,1932,11094,64480,378150,2233304, 13263772,79136844,473969586,2847911596, 17159547804,103640073972,627280131594, 3803643145596,23102172930156,140522319418164, 855880464524472,5219168576004184, 31861229045809436] |