Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 4 |
3 | 13 |
4 | 96 |
5 | 301 |
6 | 2242 |
7 | 7575 |
8 | 55958 |
9 | 196442 |
10 | 1448568 |
11 | 5188656 |
12 | 38338122 |
13 | 138866688 |
14 | 1029494580 |
15 | 3754449699 |
16 | 27929878716 |
17 | 102325331440 |
18 | 763577070328 |
19 | 2806916894109 |
20 | 21001612120424 |
21 | 77405327921654 |
22 | 580452846750048 |
[0,4,13,96,301,2242,7575,55958,196442,1448568, 5188656,38338122,138866688,1029494580,3754449699, 27929878716,102325331440,763577070328, 2806916894109,21001612120424,77405327921654, 580452846750048] |