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 | 21 |
| 2 | 31 |
| 3 | 52 |
| 4 | 73 |
| 5 | 115 |
| 6 | 138 |
| 7 | 1713 |
| 8 | 1921 |
| 9 | 2334 |
| 10 | 2955 |
| 11 | 3189 |
| 12 | 37144 |
| 13 | 41233 |
| 14 | 43377 |
| 15 | 47610 |
| 16 | 53987 |
| 17 | 591597 |
| 18 | 612584 |
| 19 | 674181 |
| 20 | 716765 |
| 21 | 7310946 |
| 22 | 7917711 |
| 23 | 8328657 |
| 24 | 8946368 |
| 25 | 9775025 |
| 26 | 101121393 |
| 27 | 103196418 |
| 28 | 107317811 |
| 29 | 109514229 |
| 30 | 113832040 |
| 31 | 1271346269 |