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 | 1 |
| 2 | 1 |
| 3 | 7 |
| 4 | 19 |
| 5 | 53 |
| 6 | 81 |
| 7 | 823 |
| 8 | 5359 |
| 9 | 12923 |
| 10 | 21877 |
| 11 | 102061 |
| 12 | 354883 |
| 13 | 808865 |
| 14 | 1433689 |
| 15 | 25699639 |
| 16 | 369784999 |
| 17 | 817787423 |
| 18 | 1487830821 |
| 19 | 6512750579 |
| 20 | 23917578595 |
| 21 | 51908057021 |
| 22 | 96040578001 |
| 23 | 827937066989 |
| 24 | 6166467806391 |
| 25 | 13211837015707 |