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 | 5 |
| 5 | 11 |
| 6 | 23 |
| 7 | 29 |
| 8 | 59 |
| 9 | 119 |
| 10 | 179 |
| 11 | 209 |
| 12 | 359 |
| 13 | 419 |
| 14 | 839 |
| 15 | 1259 |
| 16 | 1679 |
| 17 | 2519 |
| 18 | 4619 |
| 19 | 7559 |
| 20 | 9239 |
| 21 | 13859 |
| 22 | 18479 |
| 23 | 27719 |
| 24 | 55439 |
| 25 | 83159 |
| 26 | 110879 |
| 27 | 120119 |
| 28 | 180179 |
| 29 | 240239 |
| 30 | 360359 |
| 31 | 720719 |
| 32 | 1081079 |
| 33 | 1441439 |
| 34 | 1801799 |
| 35 | 2042039 |
| 36 | 2882879 |
| 37 | 3063059 |
| 38 | 4084079 |
| 39 | 5405399 |
| 40 | 6126119 |