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 | 9 |
| 4 | 12 |
| 5 | 16 |
| 6 | 919 |
| 7 | 1257 |
| 8 | 1262 |
| 9 | 1621 |
| 10 | 1706 |
| 11 | 170706 |
| 12 | 904280 |
| 13 | 1258182 |
| 14 | 7901014 |
| 15 | 8659929 |
| 16 | 12458597 |
| 17 | 17070706 |
| 18 | 80472264 |
| 19 | 1616689803 |
| 20 | 1680689788 |
| 21 | 1705387643 |
| 22 | 7360311900 |
| 23 | 8032814139 |
| 24 | 8055329360 |
| 25 | 12574461617 |
| 26 | 16794058711 |
| 27 | 165058650666 |
| 28 | 844706005220 |
| 29 | 1250999800012 |
| 30 | 1255589965852 |