Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 3 |
2 | 15 |
3 | 81 |
4 | 423 |
5 | 2247 |
6 | 11925 |
7 | 63291 |
8 | 335943 |
9 | 1783137 |
10 | 9464655 |
11 | 50237151 |
12 | 266652213 |
13 | 1415355027 |
14 | 7512519135 |
15 | 39875467761 |
16 | 211653760983 |
17 | 1123430446167 |
18 | 5963021689365 |
19 | 31650938239371 |
20 | 167999035324503 |
21 | 891716879181057 |
[3,15,81,423,2247,11925,63291,335943,1783137, 9464655,50237151,266652213,1415355027,7512519135, 39875467761,211653760983,1123430446167, 5963021689365,31650938239371,167999035324503, 891716879181057] |