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 | 4 |
| 2 | 15 |
| 3 | 55 |
| 4 | 119 |
| 5 | 253 |
| 6 | 403 |
| 7 | 697 |
| 8 | 893 |
| 9 | 1357 |
| 10 | 1943 |
| 11 | 2263 |
| 12 | 3071 |
| 13 | 3977 |
| 14 | 4429 |
| 15 | 5123 |
| 16 | 6731 |
| 17 | 8083 |
| 18 | 9089 |
| 19 | 10519 |
| 20 | 11857 |
| 21 | 13067 |
| 22 | 15089 |
| 23 | 16351 |
| 24 | 18779 |
| 25 | 22019 |
| 26 | 23533 |
| 27 | 24823 |
| 28 | 27499 |
| 29 | 29321 |
| 30 | 31301 |
| 31 | 35941 |
| 32 | 40217 |
| 33 | 42881 |
| 34 | 46009 |
| 35 | 51703 |
| 36 | 53303 |
| 37 | 57619 |
| 38 | 61777 |
| 39 | 64963 |
| 40 | 69373 |
| 41 | 75001 |