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 | 0 |
| 2 | 25272 |
| 3 | 357756 |
| 4 | 8277072 |
| 5 | 159397596 |
| 6 | 3266423688 |
| 7 | 63310818360 |
| 8 | 1232016734502 |
| 9 | 23480085224460 |
| 10 | 445037745455958 |
| 11 | 8347562556153996 |
| 12 | 155656709783860410 |
| 13 | 2883687582601214532 |
| 14 | 53163977044543395168 |
| 15 | 975616567564729165860 |