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 | 11 |
| 3 | 15 |
| 4 | 23 |
| 5 | 35 |
| 6 | 71 |
| 7 | 95 |
| 8 | 183 |
| 9 | 475 |
| 10 | 579 |
| 11 | 631 |
| 12 | 759 |
| 13 | 1519 |
| 14 | 1771 |
| 15 | 3031 |
| 16 | 6035 |
| 17 | 6951 |
| 18 | 11423 |
| 19 | 37451 |
| 20 | 51935 |
| 21 | 68051 |