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 | 14 |
| 3 | 69 |
| 4 | 102 |
| 5 | 123 |
| 6 | 134 |
| 7 | 164 |
| 8 | 276 |
| 9 | 639 |
| 10 | 2556 |
| 11 | 9568 |
| 12 | 1259196 |
| 13 | 1333334 |
| 14 | 1473381 |
| 15 | 1741983 |
| 16 | 133333334 |
| 17 | 821554911 |
| 18 | 929247534 |
| 19 | 1333333334 |
| 20 | 22214600673 |
| 21 | 133333333334 |