Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 20 |
6 | 73 |
7 | 281 |
8 | 1125 |
9 | 4636 |
10 | 19540 |
11 | 83848 |
12 | 365107 |
13 | 1609285 |
14 | 7166523 |
15 | 32195965 |
16 | 145746024 |
17 | 664165843 |
18 | 3044370240 |
19 | 14027289780 |
20 | 64932957320 |
21 | 301833739881 |
22 | 1408338395737 |
23 | 6593747768053 |
24 | 30967985680291 |
25 | 145859467298446 |
26 | 688805924907628 |
27 | 3260700755258527 |
[1,1,2,6,20,73,281,1125,4636,19540,83848,365107, 1609285,7166523,32195965,145746024,664165843, 3044370240,14027289780,64932957320,301833739881, 1408338395737,6593747768053,30967985680291, 145859467298446,688805924907628,3260700755258527] |