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 | 13 |
| 3 | 169 |
| 4 | 1027 |
| 5 | 2197 |
| 6 | 13351 |
| 7 | 28561 |
| 8 | 81133 |
| 9 | 173563 |
| 10 | 371293 |
| 11 | 468481 |
| 12 | 685633 |
| 13 | 1054729 |
| 14 | 2256319 |
| 15 | 2890927 |
| 16 | 4826809 |
| 17 | 6090253 |
| 18 | 6409507 |
| 19 | 8913229 |
| 20 | 13711477 |
| 21 | 29332147 |
| 22 | 37009999 |
| 23 | 37582051 |
| 24 | 54165007 |
| 25 | 62748517 |
| 26 | 79173289 |
| 27 | 83323591 |
| 28 | 115871977 |
| 29 | 178249201 |
| 30 | 228383233 |