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 | 2 |
| 3 | 5 |
| 4 | 21 |
| 5 | 9177 |
| 6 | 244965 |
| 7 | 14307854 |
| 8 | 24571869 |
| 9 | 128199057 |
| 10 | 140830365 |
| 11 | 401767629 |
| 12 | 420567854 |
| 13 | 468190437 |
| 14 | 525970977 |
| 15 | 780768165 |
| 16 | 886434645 |
| 17 | 1597167645 |
| 18 | 4046753949 |
| 19 | 4473784821 |
| 20 | 5364666165 |
| 21 | 5515718205 |
| 22 | 11175736334 |
| 23 | 14408460165 |
| 24 | 18026319710 |
| 25 | 20106993885 |
| 26 | 20357733129 |