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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 426 |
| 9 | 428 |
| 10 | 452 |
| 11 | 880 |
| 12 | 906 |
| 13 | 932 |
| 14 | 1360 |
| 15 | 7687134 |
| 16 | 53809938 |
| 17 | 2571412221 |
| 18 | 2582875882 |
| 19 | 5016909933 |
| 20 | 5154289245 |
| 21 | 7736157463 |
| 22 | 7748731389 |
| 23 | 39728612701 |
| 24 | 109634280128 |
| 25 | 116779253264 |
| 26 | 198109784526 |
| 27 | 233617301990 |
| 28 | 480974817878 |
| 29 | 1011847148845 |
| 30 | 1432434922737 |