Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 2 |
3 | 16 |
4 | 44 |
5 | 248 |
6 | 2136 |
7 | 13536 |
8 | 116448 |
9 | 1075392 |
10 | 13066560 |
11 | 136385280 |
12 | 1811975040 |
13 | 23777683200 |
14 | 354509003520 |
15 | 5632664970240 |
16 | 93712140103680 |
17 | 1631567291719680 |
18 | 30968760551178240 |
19 | 605247894280028160 |
20 | 12515132360676556800 |
21 | 274444506310599475200 |
[1,2,2,16,44,248,2136,13536,116448,1075392, 13066560,136385280,1811975040,23777683200, 354509003520,5632664970240,93712140103680, 1631567291719680,30968760551178240, 605247894280028160,12515132360676556800, 274444506310599475200] |