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 | 500001 |
| 2 | 21898963 |
| 3 | 74859849 |
| 4 | 159382659 |
| 5 | 275467393 |
| 6 | 423114051 |
| 7 | 602322633 |
| 8 | 813093139 |
| 9 | 1055425569 |
| 10 | 1329319923 |
| 11 | 1634776201 |
| 12 | 1971794403 |
| 13 | 2340374529 |
| 14 | 2740516579 |
| 15 | 3172220553 |
| 16 | 3635486451 |
| 17 | 4130314273 |
| 18 | 4656704019 |
| 19 | 5214655689 |
| 20 | 5804169283 |