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 | 1 |
| 2 | 1023 |
| 3 | 29524 |
| 4 | 523776 |
| 5 | 2441406 |
| 6 | 30203052 |
| 7 | 47079208 |
| 8 | 268173312 |
| 9 | 581120892 |
| 10 | 2497558338 |
| 11 | 2593742460 |
| 12 | 15463962624 |
| 13 | 11488207654 |
| 14 | 48162029784 |
| 15 | 72080070744 |
| 16 | 137304735744 |
| 17 | 125999618778 |
| 18 | 594486672516 |
| 19 | 340614792100 |
| 20 | 1278749869056 |