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 | 7128 |
| 3 | 67104 |
| 4 | 1114848 |
| 5 | 14710368 |
| 6 | 208867428 |
| 7 | 2783857776 |
| 8 | 37310632920 |
| 9 | 488972134752 |
| 10 | 6374741325108 |
| 11 | 82212554730696 |
| 12 | 1054083281172600 |
| 13 | 13425573904100400 |
| 14 | 170167484580493980 |
| 15 | 2146806101503300608 |