This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 3 |
| 4 | 18 |
| 5 | 9 |
| 6 | 54 |
| 7 | 27 |
| 8 | 162 |
| 9 | 81 |
| 10 | 486 |
| 11 | 243 |
| 12 | 1458 |
| 13 | 729 |
| 14 | 4374 |
| 15 | 2187 |
| 16 | 13122 |
| 17 | 6561 |
| 18 | 39366 |
| 19 | 19683 |
| 20 | 118098 |
| 21 | 59049 |
| 22 | 354294 |
| 23 | 177147 |
| 24 | 1062882 |
| 25 | 531441 |
| 26 | 3188646 |
| 27 | 1594323 |
| 28 | 9565938 |
| 29 | 4782969 |
| 30 | 28697814 |
| 31 | 14348907 |
| 32 | 86093442 |
| 33 | 43046721 |
| 34 | 258280326 |