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 | 424 |
| 2 | 1096 |
| 3 | 2884 |
| 4 | 7612 |
| 5 | 19992 |
| 6 | 52112 |
| 7 | 135776 |
| 8 | 354428 |
| 9 | 926912 |
| 10 | 2426008 |
| 11 | 6344712 |
| 12 | 16581304 |
| 13 | 43323852 |
| 14 | 113217276 |
| 15 | 295956684 |
| 16 | 773719596 |
| 17 | 2022600900 |
| 18 | 5286817120 |
| 19 | 13818445276 |
| 20 | 36118847720 |
| 21 | 94411371892 |
| 22 | 246786721208 |
| 23 | 645084592792 |