Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
-1 | 1 |
0 | 1 |
1 | 2 |
2 | 4 |
3 | 11 |
4 | 30 |
5 | 103 |
6 | 354 |
7 | 1440 |
8 | 5911 |
9 | 27651 |
10 | 131062 |
11 | 690543 |
12 | 3693765 |
13 | 21585068 |
14 | 128165652 |
15 | 820859645 |
16 | 5343318222 |
17 | 37155889171 |
18 | 262577578134 |
19 | 1967281479508 |
20 | 14975397597557 |
21 | 120122032987319 |
22 | 978625889818014 |
23 | 8359402026954939 |
24 | 72495015037575673 |
25 | 656446920912518700 |
[1,1,2,4,11,30,103,354,1440,5911,27651,131062, 690543,3693765,21585068,128165652,820859645, 5343318222,37155889171,262577578134,1967281479508, 14975397597557,120122032987319,978625889818014, 8359402026954939,72495015037575673, 656446920912518700] |