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 | 216 |
| 2 | 4476 |
| 3 | 115452 |
| 4 | 2817548 |
| 5 | 67134380 |
| 6 | 1567933676 |
| 7 | 36068275268 |
| 8 | 819789099172 |
| 9 | 18452018423420 |
| 10 | 411983259384452 |
| 11 | 9136178140885388 |
| 12 | 201433537180523700 |
| 13 | 4419013543755451812 |
| 14 | 96521322466937887324 |
| 15 | 2100165198065619059932 |