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 | 9 |
| 2 | 11 |
| 3 | 21 |
| 4 | 43 |
| 5 | 57 |
| 6 | 119 |
| 7 | 249 |
| 8 | 331 |
| 9 | 693 |
| 10 | 1451 |
| 11 | 1929 |
| 12 | 4039 |
| 13 | 8457 |
| 14 | 11243 |
| 15 | 23541 |
| 16 | 49291 |
| 17 | 65529 |
| 18 | 137207 |
| 19 | 287289 |
| 20 | 381931 |
| 21 | 799701 |
| 22 | 1674443 |
| 23 | 2226057 |
| 24 | 4660999 |
| 25 | 9759369 |
| 26 | 12974411 |
| 27 | 27166293 |
| 28 | 56881771 |
| 29 | 75620409 |
| 30 | 158336759 |
| 31 | 331531257 |
| 32 | 440748043 |