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 | 34 |
| 3 | 542 |
| 4 | 8638 |
| 5 | 137666 |
| 6 | 2194018 |
| 7 | 34966622 |
| 8 | 557271934 |
| 9 | 8881384322 |
| 10 | 141544877218 |
| 11 | 2255836651166 |
| 12 | 35951841541438 |
| 13 | 572973628011842 |
| 14 | 9131626206648034 |
| 15 | 145533045678356702 |
| 16 | 2319397104647059198 |
| 17 | 36964820628674590466 |
| 18 | 589117732954146388258 |
| 19 | 9388918906637667621662 |