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 | 232 |
| 1 | 610 |
| 2 | 1600 |
| 3 | 4192 |
| 4 | 10978 |
| 5 | 28744 |
| 6 | 75256 |
| 7 | 197026 |
| 8 | 515824 |
| 9 | 1350448 |
| 10 | 3535522 |
| 11 | 9256120 |
| 12 | 24232840 |
| 13 | 63442402 |
| 14 | 166094368 |
| 15 | 434840704 |
| 16 | 1138427746 |
| 17 | 2980442536 |
| 18 | 7802899864 |
| 19 | 20428257058 |
| 20 | 53481871312 |
| 21 | 140017356880 |
| 22 | 366570199330 |
| 23 | 959693241112 |
| 24 | 2512509524008 |