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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 3 |
| 5 | 9 |
| 6 | 3 |
| 7 | 21 |
| 8 | 15 |
| 9 | 9 |
| 10 | 15 |
| 11 | 21 |
| 12 | 3 |
| 13 | 45 |
| 14 | 135 |
| 15 | 75 |
| 16 | 15 |
| 17 | 99 |
| 18 | 93 |
| 19 | 99 |
| 20 | 315 |
| 21 | 105 |
| 22 | 105 |
| 23 | 15 |
| 24 | 75 |
| 25 | 339 |
| 26 | 117 |
| 27 | 261 |
| 28 | 183 |
| 29 | 351 |
| 30 | 453 |
| 31 | 1281 |
| 32 | 267 |
| 33 | 675 |
| 34 | 867 |
| 35 | 819 |
| 36 | 117 |
| 37 | 69 |
| 38 | 2343 |
| 39 | 1995 |
| 40 | 1005 |
| 41 | 2949 |
| 42 | 165 |
| 43 | 741 |
| 44 | 603 |
| 45 | 315 |
| 46 | 1287 |
| 47 | 1629 |
| 48 | 243 |
| 49 | 519 |
| 50 | 765 |
| 51 | 165 |
| 52 | 1233 |
| 53 | 741 |
| 54 | 1797 |
| 55 | 339 |
| 56 | 177 |