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 | 7 |
| 4 | 17 |
| 5 | 24 |
| 6 | 305 |
| 7 | 329 |
| 8 | 963 |
| 9 | 2255 |
| 10 | 5473 |
| 11 | 7728 |
| 12 | 98209 |
| 13 | 105937 |
| 14 | 310083 |
| 15 | 726103 |
| 16 | 1762289 |
| 17 | 2488392 |
| 18 | 31622993 |
| 19 | 34111385 |
| 20 | 99845763 |
| 21 | 233802911 |
| 22 | 567451585 |
| 23 | 801254496 |
| 24 | 10182505537 |
| 25 | 10983760033 |
| 26 | 32150025603 |
| 27 | 75283811239 |
| 28 | 182717648081 |
| 29 | 258001459320 |
| 30 | 3278735159921 |