Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 15 |
3 | 81 |
4 | 375 |
5 | 2113 |
6 | 11911 |
7 | 71221 |
8 | 433343 |
9 | 2704049 |
10 | 17125871 |
11 | 110044549 |
12 | 714925975 |
13 | 4690166833 |
14 | 31020995831 |
15 | 206646565637 |
16 | 1385159527343 |
17 | 9335979423089 |
18 | 63232378792703 |
19 | 430146956724677 |
20 | 2937659194003655 |
[1,7,15,81,375,2113,11911,71221,433343,2704049, 17125871,110044549,714925975,4690166833, 31020995831,206646565637,1385159527343, 9335979423089,63232378792703,430146956724677, 2937659194003655] |