Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | 5 |
3 | -1 |
4 | 121 |
5 | 1039 |
6 | 20221 |
7 | 416975 |
8 | 10573361 |
9 | 309650399 |
10 | 10335294901 |
11 | 386839539679 |
12 | 16045117551145 |
13 | 730346985279599 |
14 | 36191355037097261 |
15 | 1939288174467052079 |
16 | 111724538085236200801 |
17 | 6886112439557645126335 |
18 | 452112545350761238085221 |
[1,-1,5,-1,121,1039,20221,416975,10573361, 309650399,10335294901,386839539679,16045117551145, 730346985279599,36191355037097261, 1939288174467052079,111724538085236200801, 6886112439557645126335,452112545350761238085221] |