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 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 13 |
| 6 | 23 |
| 7 | 45 |
| 8 | 87 |
| 9 | 167 |
| 10 | 321 |
| 11 | 619 |
| 12 | 1193 |
| 13 | 2299 |
| 14 | 4431 |
| 15 | 8541 |
| 16 | 16463 |
| 17 | 31733 |
| 18 | 61167 |
| 19 | 117903 |
| 20 | 227265 |
| 21 | 438067 |
| 22 | 844401 |
| 23 | 1627635 |
| 24 | 3137367 |
| 25 | 6047469 |
| 26 | 11656871 |
| 27 | 22469341 |
| 28 | 43311047 |
| 29 | 83484727 |
| 30 | 160921985 |
| 31 | 310187099 |
| 32 | 597904857 |
| 33 | 1152498667 |