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 | 7 |
| 2 | 49 |
| 3 | 229 |
| 4 | 801 |
| 5 | 2297 |
| 6 | 5699 |
| 7 | 12657 |
| 8 | 25753 |
| 9 | 48811 |
| 10 | 87253 |
| 11 | 148501 |
| 12 | 242425 |
| 13 | 381837 |
| 14 | 583031 |
| 15 | 866369 |
| 16 | 1256913 |
| 17 | 1785103 |
| 18 | 2487481 |
| 19 | 3407461 |
| 20 | 4596145 |
| 21 | 6113185 |
| 22 | 8027691 |
| 23 | 10419185 |
| 24 | 13378601 |
| 25 | 17009331 |
| 26 | 21428317 |
| 27 | 26767189 |
| 28 | 33173449 |
| 29 | 40811701 |
| 30 | 49864927 |