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 | 29 |
| 3 | 283 |
| 4 | 2819 |
| 5 | 28183 |
| 6 | 281807 |
| 7 | 2818043 |
| 8 | 28180393 |
| 9 | 281803927 |
| 10 | 2818039241 |
| 11 | 28180392407 |
| 12 | 281803924067 |
| 13 | 2818039240619 |
| 14 | 28180392406171 |
| 15 | 281803924061641 |
| 16 | 2818039240616359 |
| 17 | 28180392406163579 |
| 18 | 281803924061635783 |
| 19 | 2818039240616357827 |
| 20 | 28180392406163578069 |
| 21 | 281803924061635780589 |