Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | 1 |
4 | 3 |
5 | 3 |
6 | 4 |
7 | 15 |
8 | 30 |
9 | 42 |
10 | 99 |
11 | 255 |
12 | 475 |
13 | 915 |
14 | 2232 |
15 | 4977 |
16 | 9945 |
17 | 21945 |
18 | 51093 |
19 | 110634 |
20 | 238005 |
21 | 542341 |
22 | 1227390 |
23 | 2696841 |
24 | 6035886 |
25 | 13770402 |
26 | 31001133 |
27 | 69485295 |
28 | 157945293 |
29 | 359888373 |
30 | 814699002 |
31 | 1850816823 |
32 | 4231092060 |
33 | 9659302380 |
34 | 22028018679 |
[1,1,0,1,3,3,4,15,30,42,99,255,475,915,2232,4977, 9945,21945,51093,110634,238005,542341,1227390, 2696841,6035886,13770402,31001133,69485295, 157945293,359888373,814699002,1850816823, 4231092060,9659302380,22028018679] |