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 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 24 |
| 6 | 51 |
| 7 | 97 |
| 8 | 207 |
| 9 | 428 |
| 10 | 946 |
| 11 | 2088 |
| 12 | 4831 |
| 13 | 11209 |
| 14 | 26717 |
| 15 | 64058 |
| 16 | 155725 |
| 17 | 380400 |
| 18 | 936575 |
| 19 | 2314105 |
| 20 | 5744700 |
| 21 | 14300416 |
| 22 | 35708268 |
| 23 | 89359536 |
| 24 | 224121973 |
| 25 | 563126689 |
| 26 | 1417378191 |
| 27 | 3572884062 |
| 28 | 9019324297 |
| 29 | 22797540648 |