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 | 23 |
| 2 | 359 |
| 3 | 4987 |
| 4 | 63869 |
| 5 | 778581 |
| 6 | 9185685 |
| 7 | 105854997 |
| 8 | 1198530315 |
| 9 | 13385107495 |
| 10 | 147849112851 |
| 11 | 1618471517571 |
| 12 | 17584519050293 |
| 13 | 189843229312125 |
| 14 | 2038412681323151 |
| 15 | 21783930695524161 |
| 16 | 231837345778656901 |