Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 21 |
3 | 124 |
4 | 761 |
5 | 4724 |
6 | 29421 |
7 | 183404 |
8 | 1143601 |
9 | 7131364 |
10 | 44471301 |
11 | 277325404 |
12 | 1729418921 |
13 | 10784771924 |
14 | 67254567261 |
15 | 419404046924 |
16 | 2615432135521 |
17 | 16310012568004 |
18 | 101710347053301 |
19 | 634272638178364 |
20 | 3955367287840601 |
[1,4,21,124,761,4724,29421,183404,1143601,7131364, 44471301,277325404,1729418921,10784771924, 67254567261,419404046924,2615432135521, 16310012568004,101710347053301,634272638178364, 3955367287840601] |