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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 27 |
| 5 | 31 |
| 6 | 89 |
| 7 | 120 |
| 8 | 809 |
| 9 | 929 |
| 10 | 2667 |
| 11 | 3596 |
| 12 | 24243 |
| 13 | 27839 |
| 14 | 79921 |
| 15 | 107760 |
| 16 | 726481 |
| 17 | 834241 |
| 18 | 2394963 |
| 19 | 3229204 |
| 20 | 21770187 |
| 21 | 24999391 |
| 22 | 71768969 |
| 23 | 96768360 |
| 24 | 652379129 |
| 25 | 749147489 |
| 26 | 2150674107 |
| 27 | 2899821596 |
| 28 | 19549603683 |
| 29 | 22449425279 |
| 30 | 64448454241 |
| 31 | 86897879520 |