Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 18 |
4 | 102 |
5 | 684 |
6 | 5216 |
7 | 44388 |
8 | 415672 |
9 | 4234904 |
10 | 46525992 |
11 | 547327904 |
12 | 6854491840 |
13 | 90940138256 |
14 | 1272862982272 |
15 | 18728235407712 |
16 | 288765445378272 |
17 | 4653013453323968 |
18 | 78164063007644288 |
19 | 1365903793778043712 |
20 | 24781386644286473856 |
21 | 465969812835308934272 |
22 | 9066115469486822859392 |
[1,1,4,18,102,684,5216,44388,415672,4234904, 46525992,547327904,6854491840,90940138256, 1272862982272,18728235407712,288765445378272, 4653013453323968,78164063007644288, 1365903793778043712,24781386644286473856, 465969812835308934272,9066115469486822859392] |