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 | 45 |
| 2 | 609 |
| 3 | 1218 |
| 4 | 1827 |
| 5 | 3213 |
| 6 | 21309 |
| 7 | 28206 |
| 8 | 29319 |
| 9 | 31917 |
| 10 | 39333 |
| 11 | 47337 |
| 12 | 78666 |
| 13 | 102090 |
| 14 | 117999 |
| 15 | 204180 |
| 16 | 406437 |
| 17 | 302867592 |
| 18 | 4507146801 |
| 19 | 5440407522 |