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 | 1 |
| 1 | 3 |
| 2 | 10 |
| 3 | 37 |
| 4 | 144 |
| 5 | 571 |
| 6 | 2278 |
| 7 | 9105 |
| 8 | 36412 |
| 9 | 145639 |
| 10 | 582546 |
| 11 | 2330173 |
| 12 | 9320680 |
| 13 | 37282707 |
| 14 | 149130814 |
| 15 | 596523241 |
| 16 | 2386092948 |
| 17 | 9544371775 |
| 18 | 38177487082 |
| 19 | 152709948309 |
| 20 | 610839793216 |
| 21 | 2443359172843 |
| 22 | 9773436691350 |
| 23 | 39093746765377 |