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 | 2 |
| 1 | 53 |
| 2 | 1619 |
| 3 | 38873 |
| 4 | 821641 |
| 5 | 16290047 |
| 6 | 310248241 |
| 7 | 5750079047 |
| 8 | 104484802057 |
| 9 | 1870358526653 |
| 10 | 33089240375501 |
| 11 | 579863159340527 |
| 12 | 10082409897709157 |
| 13 | 174160587542317721 |
| 14 | 2991614170035124397 |
| 15 | 51140670371058101123 |
| 16 | 870566678511500413493 |
| 17 | 14764978793012287880219 |