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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 27 |
| 4 | 81 |
| 5 | 243 |
| 6 | 729 |
| 7 | 2187 |
| 8 | 6561 |
| 9 | 9683 |
| 10 | 9049 |
| 11 | 7147 |
| 12 | 1441 |
| 13 | 4323 |
| 14 | 2969 |
| 15 | 8907 |
| 16 | 6721 |
| 17 | 163 |
| 18 | 489 |
| 19 | 1467 |
| 20 | 4401 |
| 21 | 3203 |
| 22 | 9609 |
| 23 | 8827 |
| 24 | 6481 |
| 25 | 9443 |
| 26 | 8329 |
| 27 | 4987 |
| 28 | 4961 |
| 29 | 4883 |
| 30 | 4649 |
| 31 | 3947 |
| 32 | 1841 |
| 33 | 5523 |
| 34 | 6569 |
| 35 | 9707 |
| 36 | 9121 |
| 37 | 7363 |
| 38 | 2089 |
| 39 | 6267 |
| 40 | 8801 |
| 41 | 6403 |
| 42 | 9209 |
| 43 | 7627 |
| 44 | 2881 |
| 45 | 8643 |
| 46 | 5929 |
| 47 | 7787 |
| 48 | 3361 |
| 49 | 83 |
| 50 | 249 |
| 51 | 747 |