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 | 2 |
| 1 | 14 |
| 2 | 74 |
| 3 | 374 |
| 4 | 1874 |
| 5 | 9374 |
| 6 | 46874 |
| 7 | 234374 |
| 8 | 1171874 |
| 9 | 5859374 |
| 10 | 29296874 |
| 11 | 146484374 |
| 12 | 732421874 |
| 13 | 3662109374 |
| 14 | 18310546874 |
| 15 | 91552734374 |
| 16 | 457763671874 |
| 17 | 2288818359374 |
| 18 | 11444091796874 |
| 19 | 57220458984374 |
| 20 | 286102294921874 |
| 21 | 1430511474609374 |
| 22 | 7152557373046874 |
| 23 | 35762786865234374 |