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 | 1760 |
| 2 | 526443 |
| 3 | 34725760 |
| 4 | 932587453 |
| 5 | 13937940952 |
| 6 | 138198204339 |
| 7 | 1012226679296 |
| 8 | 5875958390949 |
| 9 | 28376054552968 |
| 10 | 118033137259563 |
| 11 | 433946033473016 |
| 12 | 1438074947544977 |
| 13 | 4362051703339832 |
| 14 | 12258717265789491 |
| 15 | 32233542519648928 |
| 16 | 79941392042719253 |
| 17 | 188248433874383736 |
| 18 | 423266982431567911 |