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 | 240 |
| 2 | 1803 |
| 3 | 13544 |
| 4 | 101743 |
| 5 | 764297 |
| 6 | 5741427 |
| 7 | 43129809 |
| 8 | 323992699 |
| 9 | 2433844978 |
| 10 | 18283132290 |
| 11 | 137343556947 |
| 12 | 1031729811702 |
| 13 | 7750391995200 |
| 14 | 58221227493827 |
| 15 | 437359985531993 |
| 16 | 3285464171376777 |
| 17 | 24680526747938834 |
| 18 | 185401017567775934 |