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 | 4 |
| 2 | 8 |
| 3 | 34 |
| 4 | 76 |
| 5 | 276 |
| 6 | 700 |
| 7 | 2276 |
| 8 | 5992 |
| 9 | 18542 |
| 10 | 50488 |
| 11 | 151814 |
| 12 | 420680 |
| 13 | 1241580 |
| 14 | 3481308 |
| 15 | 10162686 |
| 16 | 28707288 |
| 17 | 83211126 |
| 18 | 236138900 |
| 19 | 681383716 |
| 20 | 1939299184 |
| 21 | 5579324890 |
| 22 | 15908310224 |
| 23 | 45678520824 |
| 24 | 130391096068 |