Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 2 |
4 | 2 |
5 | 4 |
6 | 12 |
7 | 24 |
8 | 54 |
9 | 130 |
10 | 300 |
11 | 706 |
12 | 1686 |
13 | 4028 |
14 | 9686 |
15 | 23426 |
16 | 56866 |
17 | 138584 |
18 | 338940 |
19 | 831508 |
20 | 2045736 |
21 | 5046240 |
22 | 12477290 |
23 | 30919122 |
24 | 76774382 |
25 | 190995224 |
26 | 475979602 |
27 | 1188125394 |
28 | 2970282794 |
29 | 7436232760 |
30 | 18641883396 |
31 | 46792219972 |
32 | 117590713254 |
[1,0,0,2,2,4,12,24,54,130,300,706,1686,4028,9686, 23426,56866,138584,338940,831508,2045736,5046240, 12477290,30919122,76774382,190995224,475979602, 1188125394,2970282794,7436232760,18641883396, 46792219972,117590713254] |