Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 12 |
4 | 54 |
5 | 210 |
6 | 1020 |
7 | 4445 |
8 | 22610 |
9 | 105210 |
10 | 551376 |
11 | 2678676 |
12 | 14332164 |
13 | 71788860 |
14 | 389991888 |
15 | 1998530820 |
16 | 10984120290 |
17 | 57293297490 |
18 | 317798892840 |
19 | 1681213457352 |
20 | 9395215622364 |
21 | 50278804820244 |
22 | 282711201927336 |
23 | 1527524202392370 |
24 | 8633634028624332 |
25 | 47028406025950300 |
26 | 266981514041485600 |
[1,1,4,12,54,210,1020,4445,22610,105210,551376, 2678676,14332164,71788860,389991888,1998530820, 10984120290,57293297490,317798892840, 1681213457352,9395215622364,50278804820244, 282711201927336,1527524202392370,8633634028624332, 47028406025950300,266981514041485600] |