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 | 5 |
| 4 | 13 |
| 5 | 21 |
| 6 | 46 |
| 7 | 78 |
| 8 | 175 |
| 9 | 303 |
| 10 | 639 |
| 11 | 1143 |
| 12 | 2539 |
| 13 | 4542 |
| 14 | 9214 |
| 15 | 17406 |
| 16 | 36735 |
| 17 | 69374 |
| 18 | 139254 |
| 19 | 270327 |
| 20 | 556031 |
| 21 | 1079294 |
| 22 | 2162678 |
| 23 | 4259819 |
| 24 | 8642558 |
| 25 | 17022974 |
| 26 | 34078590 |
| 27 | 67632893 |
| 28 | 136249338 |
| 29 | 270401534 |
| 30 | 541064701 |
| 31 | 1077935867 |
| 32 | 2162163707 |