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 | 14 |
| 2 | 124 |
| 3 | 1124 |
| 4 | 10624 |
| 5 | 103124 |
| 6 | 1015624 |
| 7 | 10078124 |
| 8 | 100390624 |
| 9 | 1001953124 |
| 10 | 10009765624 |
| 11 | 100048828124 |
| 12 | 1000244140624 |
| 13 | 10001220703124 |
| 14 | 100006103515624 |
| 15 | 1000030517578124 |
| 16 | 10000152587890624 |
| 17 | 100000762939453124 |
| 18 | 1000003814697265624 |
| 19 | 10000019073486328124 |