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 | 6 |
| 4 | 9 |
| 5 | 13 |
| 6 | 17 |
| 7 | 22 |
| 8 | 28 |
| 9 | 35 |
| 10 | 41 |
| 11 | 49 |
| 12 | 57 |
| 13 | 65 |
| 14 | 73 |
| 15 | 82 |
| 16 | 93 |
| 17 | 103 |
| 18 | 113 |
| 19 | 125 |
| 20 | 137 |