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 | 17 |
| 2 | 131 |
| 3 | 409 |
| 4 | 953 |
| 5 | 1889 |
| 6 | 8669 |
| 7 | 18539 |
| 8 | 60623 |
| 9 | 77689 |
| 10 | 122321 |
| 11 | 373049 |
| 12 | 437293 |
| 13 | 590267 |
| 14 | 2249441 |
| 15 | 8975009 |
| 16 | 9649303 |
| 17 | 11111117 |
| 18 | 14526289 |
| 19 | 19836689 |
| 20 | 26484839 |
| 21 | 31201649 |
| 22 | 56608289 |
| 23 | 67796273 |
| 24 | 80565889 |
| 25 | 84021983 |
| 26 | 87588089 |
| 27 | 107150489 |
| 28 | 150402113 |