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) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 71 |
| 3 | 733 |
| 4 | 7573 |
| 5 | 78243 |
| 6 | 808395 |
| 7 | 8352217 |
| 8 | 86293865 |
| 9 | 891575391 |
| 10 | 9211624463 |
| 11 | 95173135221 |
| 12 | 983314691581 |
| 13 | 10159461285307 |
| 14 | 104966044432531 |
| 15 | 1084493574452273 |
| 16 | 11204826469232593 |
| 17 | 115766602184825143 |
| 18 | 1196083332322900695 |
| 19 | 12357755266727364237 |
| 20 | 127678491209925526885 |