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 | 3 |
| 3 | 1 |
| 4 | 9 |
| 5 | 9 |
| 6 | 1 |
| 7 | 27 |
| 8 | 63 |
| 9 | 18 |
| 10 | 1 |
| 11 | 81 |
| 12 | 405 |
| 13 | 225 |
| 14 | 30 |
| 15 | 1 |
| 16 | 243 |
| 17 | 2511 |
| 18 | 2430 |
| 19 | 585 |
| 20 | 45 |
| 21 | 1 |
| 22 | 729 |
| 23 | 15309 |
| 24 | 24381 |
| 25 | 9450 |
| 26 | 1260 |
| 27 | 63 |
| 28 | 1 |
| 29 | 2187 |
| 30 | 92583 |
| 31 | 234738 |
| 32 | 137781 |
| 33 | 28350 |
| 34 | 2394 |
| 35 | 84 |
| 36 | 1 |
| 37 | 6561 |
| 38 | 557685 |
| 39 | 2205225 |
| 40 | 1888110 |
| 41 | 563031 |
| 42 | 71442 |
| 43 | 4158 |
| 44 | 108 |
| 45 | 1 |