Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 4 |
3 | 4 |
4 | 25 |
5 | 52 |
6 | 196 |
7 | 520 |
8 | 1681 |
9 | 4840 |
10 | 14884 |
11 | 44044 |
12 | 133225 |
13 | 397852 |
14 | 1196836 |
15 | 3585040 |
16 | 10764961 |
17 | 32278480 |
18 | 96864964 |
19 | 290545684 |
20 | 871725625 |
21 | 2615029252 |
22 | 7845353476 |
23 | 23535617560 |
24 | 70607649841 |
25 | 211821620920 |
26 | 635467254244 |
27 | 1906397776924 |
[0,4,4,25,52,196,520,1681,4840,14884,44044,133225, 397852,1196836,3585040,10764961,32278480,96864964, 290545684,871725625,2615029252,7845353476, 23535617560,70607649841,211821620920,635467254244, 1906397776924] |