Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 2 |
6 | 4 |
7 | 8 |
8 | 36 |
9 | 40 |
10 | 49 |
11 | 126 |
12 | 121 |
13 | 440 |
14 | 2809 |
15 | 11395 |
16 | 32761 |
17 | 132183 |
18 | 881721 |
19 | 3015500 |
20 | 19642624 |
21 | 106493895 |
22 | 249987721 |
23 | 1257922092 |
24 | 4609187881 |
25 | 29262161844 |
26 | 189192811369 |
27 | 1068996265025 |
28 | 7388339422500 |
29 | 67416357342087 |
30 | 465724670229025 |
31 | 1979950199225010 |
[1,1,1,1,2,4,8,36,40,49,126,121,440,2809,11395, 32761,132183,881721,3015500,19642624,106493895, 249987721,1257922092,4609187881,29262161844, 189192811369,1068996265025,7388339422500, 67416357342087,465724670229025,1979950199225010] |