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 | 1233 |
| 2 | 8833 |
| 3 | 990100 |
| 4 | 94122353 |
| 5 | 1765038125 |
| 6 | 2584043776 |
| 7 | 7416043776 |
| 8 | 8235038125 |
| 9 | 9901009901 |
| 10 | 116788321168 |
| 11 | 123288328768 |
| 12 | 876712328768 |
| 13 | 883212321168 |
| 14 | 999900010000 |
| 15 | 13793103448276 |
| 16 | 15348303604525 |
| 17 | 84651703604525 |
| 18 | 86206903448276 |
| 19 | 91103202846976 |
| 20 | 92318202663025 |