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 | 2 |
| 2 | 5 |
| 3 | 17 |
| 4 | 37 |
| 5 | 197 |
| 6 | 69 |
| 7 | 503 |
| 8 | 1041 |
| 9 | 9649 |
| 10 | 9901 |
| 11 | 111431 |
| 12 | 113741 |
| 13 | 1506353 |
| 14 | 1532093 |
| 15 | 1556117 |
| 16 | 3157279 |
| 17 | 54394463 |
| 18 | 18358381 |
| 19 | 352893319 |
| 20 | 71354639 |
| 21 | 24031221 |
| 22 | 24266365 |
| 23 | 563299563 |
| 24 | 1704771547 |
| 25 | 42976237267 |
| 26 | 43319457067 |
| 27 | 392849685203 |
| 28 | 395718022103 |
| 29 | 11556136074187 |