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 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 23 |
| 5 | 113 |
| 6 | 1129 |
| 7 | 1327 |
| 8 | 19609 |
| 9 | 31397 |
| 10 | 155921 |
| 11 | 360653 |
| 12 | 370261 |
| 13 | 1357201 |
| 14 | 2010733 |
| 15 | 17051707 |
| 16 | 20831323 |
| 17 | 191912783 |
| 18 | 436273009 |
| 19 | 2300942549 |
| 20 | 3842610773 |
| 21 | 4302407359 |
| 22 | 10726904659 |
| 23 | 25056082087 |
| 24 | 304599508537 |
| 25 | 461690510011 |
| 26 | 1346294310749 |
| 27 | 1408695493609 |