Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 8 |
4 | 31 |
5 | 106 |
6 | 336 |
7 | 1002 |
8 | 2842 |
9 | 7733 |
10 | 20310 |
11 | 51721 |
12 | 128170 |
13 | 309981 |
14 | 733391 |
15 | 1700803 |
16 | 3872770 |
17 | 8670939 |
18 | 19113101 |
19 | 41523359 |
20 | 88995739 |
21 | 188335956 |
22 | 393837053 |
23 | 814361552 |
24 | 1666112093 |
25 | 3374591118 |
26 | 6770019119 |
27 | 13459008138 |
[1,0,2,8,31,106,336,1002,2842,7733,20310,51721, 128170,309981,733391,1700803,3872770,8670939, 19113101,41523359,88995739,188335956,393837053, 814361552,1666112093,3374591118,6770019119, 13459008138] |