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 | 5 |
| 2 | 7 |
| 3 | 11 |
| 4 | 29 |
| 5 | 79 |
| 6 | 83 |
| 7 | 241 |
| 8 | 727 |
| 9 | 6563 |
| 10 | 19681 |
| 11 | 59051 |
| 12 | 4782971 |
| 13 | 14348909 |
| 14 | 31381059607 |
| 15 | 282429536483 |
| 16 | 2541865828331 |
| 17 | 150094635296999123 |
| 18 | 450283905890997361 |
| 19 | 36472996377170786401 |
| 20 | 1144561273430837494885949696429 |