Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 19 |
4 | 145 |
5 | 954 |
6 | 11952 |
7 | 101664 |
8 | 1573344 |
9 | 21179232 |
10 | 390661056 |
11 | 4857760512 |
12 | 138055228416 |
13 | 1989835352064 |
14 | 48554918608896 |
15 | 1184490930438144 |
16 | 37179368055373824 |
17 | 683493250562260992 |
18 | 26913000032107757568 |
19 | 548273767789158727680 |
20 | 23227773590084738088960 |
21 | 751700319286194622955520 |
[1,4,19,145,954,11952,101664,1573344,21179232, 390661056,4857760512,138055228416,1989835352064, 48554918608896,1184490930438144,37179368055373824, 683493250562260992,26913000032107757568, 548273767789158727680,23227773590084738088960, 751700319286194622955520] |