n | a(n) |
---|---|
1 | 12 |
2 | 54 |
3 | 224 |
4 | 950 |
5 | 4012 |
6 | 16964 |
7 | 71712 |
8 | 303170 |
9 | 1281664 |
10 | 5418314 |
11 | 22906232 |
12 | 96837444 |
13 | 409385940 |
14 | 1730703022 |
15 | 7316648160 |
16 | 30931557950 |
17 | 130764969444 |
18 | 552816553732 |
19 | 2337064300200 |
20 | 9880075964922 |
21 | 41768598769664 |
22 | 176579193270290 |
[12,54,224,950,4012,16964,71712,303170,1281664, 5418314,22906232,96837444,409385940,1730703022, 7316648160,30931557950,130764969444,552816553732, 2337064300200,9880075964922,41768598769664, 176579193270290] |