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 | 1 |
| 2 | 9 |
| 3 | 10 |
| 4 | 189 |
| 5 | 199 |
| 6 | 1781 |
| 7 | 1980 |
| 8 | 37421 |
| 9 | 39401 |
| 10 | 352629 |
| 11 | 392030 |
| 12 | 7409169 |
| 13 | 7801199 |
| 14 | 69818761 |
| 15 | 77619960 |
| 16 | 1466978041 |
| 17 | 1544598001 |
| 18 | 13823762049 |
| 19 | 15368360050 |
| 20 | 290454242949 |
| 21 | 305822602999 |
| 22 | 2737035066941 |
| 23 | 3042857669940 |
| 24 | 57508473125861 |
| 25 | 60551330795801 |
| 26 | 541919119492269 |