Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 18 |
6 | 61 |
7 | 210 |
8 | 778 |
9 | 3008 |
10 | 12219 |
11 | 52268 |
12 | 231726 |
13 | 1083012 |
14 | 5202199 |
15 | 26307710 |
16 | 135972580 |
17 | 738339310 |
18 | 4081523615 |
19 | 23649300862 |
20 | 139096468520 |
21 | 855529383396 |
22 | 5329630673249 |
23 | 34643027568520 |
24 | 227682351175868 |
25 | 1558106351450416 |
26 | 10766192988109009 |
[0,0,1,2,6,18,61,210,778,3008,12219,52268,231726, 1083012,5202199,26307710,135972580,738339310, 4081523615,23649300862,139096468520,855529383396, 5329630673249,34643027568520,227682351175868, 1558106351450416,10766192988109009] |