Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 4 |
2 | 17 |
3 | 56 |
4 | 172 |
5 | 561 |
6 | 1826 |
7 | 5880 |
8 | 18993 |
9 | 61424 |
10 | 198472 |
11 | 641297 |
12 | 2072482 |
13 | 6697372 |
14 | 21642593 |
15 | 69939048 |
16 | 226011412 |
17 | 730364961 |
18 | 2360204994 |
19 | 7627103920 |
20 | 24647309729 |
21 | 79648825312 |
22 | 257388562256 |
23 | 831762066401 |
24 | 2687874415810 |
25 | 8685980265204 |
[4,17,56,172,561,1826,5880,18993,61424,198472, 641297,2072482,6697372,21642593,69939048, 226011412,730364961,2360204994,7627103920, 24647309729,79648825312,257388562256,831762066401, 2687874415810,8685980265204] |