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 | 1 |
| 2 | 11 |
| 3 | 167 |
| 4 | 553 |
| 5 | 13655 |
| 6 | 100967 |
| 7 | 1160869 |
| 8 | 22885339 |
| 9 | 1015565041 |
| 10 | 2087559455 |
| 11 | 113349261019 |
| 12 | 3358906732007 |
| 13 | 1141662738301 |
| 14 | 19755194336321 |
| 15 | 1465720275945305 |
| 16 | 495933038673019 |
| 17 | 41736492051778129 |
| 18 | 3843447765945901 |