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 | 11 |
| 2 | 41 |
| 3 | 101 |
| 4 | 191 |
| 5 | 461 |
| 6 | 641 |
| 7 | 1091 |
| 8 | 1871 |
| 9 | 2657 |
| 10 | 3251 |
| 11 | 6827 |
| 12 | 7877 |
| 13 | 40427 |
| 14 | 47711 |
| 15 | 58907 |
| 16 | 86111 |
| 17 | 171047 |
| 18 | 379007 |
| 19 | 385391 |
| 20 | 553097 |