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 | 50 |
| 2 | 1274 |
| 3 | 22050 |
| 4 | 291549 |
| 5 | 3140360 |
| 6 | 28695575 |
| 7 | 228732790 |
| 8 | 1623128975 |
| 9 | 10413794040 |
| 10 | 61146955156 |
| 11 | 331819334000 |
| 12 | 1677578203770 |
| 13 | 7954932265700 |
| 14 | 35582378559071 |
| 15 | 150868021657130 |
| 16 | 608916641370150 |
| 17 | 2348116000139330 |