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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 11 |
| 5 | 27 |
| 6 | 33 |
| 7 | 103 |
| 8 | 110 |
| 9 | 133 |
| 10 | 193 |
| 11 | 999 |
| 12 | 1921 |
| 13 | 5277 |
| 14 | 39085 |
| 15 | 279568 |
| 16 | 365167 |
| 17 | 870685 |
| 18 | 1539231 |
| 19 | 3794071244 |
| 20 | 9761250028 |
| 21 | 10906977906 |
| 22 | 18144658921 |
| 23 | 103136388637 |
| 24 | 134389561244 |
| 25 | 139712478096 |
| 26 | 667384153244 |
| 27 | 731220192045 |
| 28 | 1317705035571 |
| 29 | 1664555384503 |
| 30 | 3008856758047 |