Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 4 |
6 | 16 |
7 | 22 |
8 | 70 |
9 | 132 |
10 | 375 |
11 | 848 |
12 | 2428 |
13 | 6256 |
14 | 18333 |
15 | 52560 |
16 | 161436 |
17 | 500887 |
18 | 1624969 |
19 | 5384625 |
20 | 18438815 |
21 | 64674095 |
22 | 233062429 |
23 | 859831186 |
24 | 3248411250 |
25 | 12545820860 |
26 | 49508089411 |
27 | 199410275018 |
28 | 819269777688 |
29 | 3430680180687 |
30 | 14633035575435 |
31 | 63535672197070 |
[1,0,1,1,4,4,16,22,70,132,375,848,2428,6256,18333, 52560,161436,500887,1624969,5384625,18438815, 64674095,233062429,859831186,3248411250, 12545820860,49508089411,199410275018,819269777688, 3430680180687,14633035575435,63535672197070] |