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 | 3 |
| 2 | 17 |
| 3 | 73 |
| 4 | 191 |
| 5 | 709 |
| 6 | 1289 |
| 7 | 3181 |
| 8 | 5449 |
| 9 | 7681 |
| 10 | 17477 |
| 11 | 33889 |
| 12 | 87961 |
| 13 | 437389 |
| 14 | 2290573 |
| 15 | 7160227 |
| 16 | 10429681 |
| 17 | 19196227 |
| 18 | 24504049 |
| 19 | 47577857 |
| 20 | 70513979 |
| 21 | 82605937 |
| 22 | 156671243 |
| 23 | 271785793 |
| 24 | 328939937 |
| 25 | 568119509 |
| 26 | 1125978241 |
| 27 | 1534657963 |
| 28 | 1710749497 |
| 29 | 4936728373 |
| 30 | 7647104183 |