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 | 0 |
| 1 | 1 |
| 2 | 35 |
| 3 | 1191 |
| 4 | 40495 |
| 5 | 1376831 |
| 6 | 46812255 |
| 7 | 1591616671 |
| 8 | 54114966815 |
| 9 | 1839908871711 |
| 10 | 62556901638175 |
| 11 | 2126934655697951 |
| 12 | 72315778293730335 |
| 13 | 2458736461986831391 |
| 14 | 83597039707552267295 |
| 15 | 2842299350056777088031 |
| 16 | 96638177901930420993055 |
| 17 | 3285698048665634313763871 |