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 | 3 |
| 2 | 5 |
| 3 | 11 |
| 4 | 127 |
| 5 | 1151 |
| 6 | 1361 |
| 7 | 19661 |
| 8 | 31469 |
| 9 | 156007 |
| 10 | 360749 |
| 11 | 370373 |
| 12 | 1357333 |
| 13 | 2010881 |
| 14 | 17051887 |
| 15 | 20831533 |
| 16 | 191913031 |
| 17 | 436273291 |
| 18 | 2300942869 |
| 19 | 3842611109 |
| 20 | 4302407713 |
| 21 | 10726905041 |
| 22 | 25056082543 |
| 23 | 304599509051 |
| 24 | 461690510543 |
| 25 | 1346294311331 |
| 26 | 1408695494197 |
| 27 | 1968188557063 |
| 28 | 2614941711251 |
| 29 | 13829048560417 |
| 30 | 19581334193189 |