Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 5 |
4 | 17 |
5 | 52 |
6 | 148 |
7 | 408 |
8 | 1101 |
9 | 2937 |
10 | 7777 |
11 | 20504 |
12 | 53912 |
13 | 141520 |
14 | 371113 |
15 | 972573 |
16 | 2547825 |
17 | 6672876 |
18 | 17473996 |
19 | 45754280 |
20 | 119797205 |
21 | 313650865 |
22 | 821177281 |
23 | 2149916400 |
24 | 5628629232 |
25 | 14736064032 |
26 | 38579712913 |
27 | 101003317493 |
28 | 264430632401 |
29 | 692289215332 |
30 | 1812438042052 |
[0,1,5,17,52,148,408,1101,2937,7777,20504,53912, 141520,371113,972573,2547825,6672876,17473996, 45754280,119797205,313650865,821177281,2149916400, 5628629232,14736064032,38579712913,101003317493, 264430632401,692289215332,1812438042052] |