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 | 21976 |
| 2 | 775096 |
| 3 | 28927984 |
| 4 | 1138541280 |
| 5 | 45147495264 |
| 6 | 1809791149768 |
| 7 | 72515584004736 |
| 8 | 2914488537817408 |
| 9 | 117033599127615880 |
| 10 | 4704742675739474176 |
| 11 | 189030631236371886792 |
| 12 | 7598451666243980931808 |
| 13 | 305353336500744007552616 |