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 | 1905628 |
| 2 | 6732373 |
| 3 | 30869213 |
| 4 | 77899469 |
| 5 | 225817709 |
| 6 | 818869469 |
| 7 | 1701546341 |
| 8 | 4243135181 |
| 9 | 8946193541 |
| 10 | 15119520701 |
| 11 | 25303912709 |
| 12 | 46580770157 |
| 13 | 86195577389 |
| 14 | 132965847509 |
| 15 | 217102866629 |
| 16 | 334423935221 |
| 17 | 463593800381 |
| 18 | 664500722261 |