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 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 35 |
| 6 | 79 |
| 7 | 184 |
| 8 | 429 |
| 9 | 1019 |
| 10 | 2467 |
| 11 | 6049 |
| 12 | 14912 |
| 13 | 37128 |
| 14 | 93117 |
| 15 | 234855 |
| 16 | 595341 |
| 17 | 1516234 |
| 18 | 3877186 |
| 19 | 9950346 |
| 20 | 25614563 |
| 21 | 66124777 |
| 22 | 171141897 |
| 23 | 443963543 |
| 24 | 1154106845 |
| 25 | 3005936865 |
| 26 | 7842921261 |
| 27 | 20496470802 |
| 28 | 53645077679 |
| 29 | 140599114669 |
| 30 | 368973074566 |
| 31 | 969455391691 |