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 | 399 |
| 2 | 935 |
| 3 | 8855 |
| 4 | 935 |
| 5 | 191807 |
| 6 | 31535 |
| 7 | 2376401921999 |
| 8 | 287432495 |
| 9 | 3512071871 |
| 10 | 443155187061431999 |
| 11 | 269174015 |
| 12 | 7187117143679 |
| 13 | 13153784862132539999 |
| 14 | 16794805460009764607 |
| 15 | 12239445970372607 |
| 16 | 308403604421150344874999 |
| 17 | 1940371455953001599 |
| 18 | 22735742424704664191 |
| 19 | 193426182224210221055 |
| 20 | 2674275760170030054482343935 |