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 | 5 |
| 3 | 43 |
| 4 | 191 |
| 5 | 1633 |
| 6 | 7253 |
| 7 | 62011 |
| 8 | 275423 |
| 9 | 2354785 |
| 10 | 10458821 |
| 11 | 89419819 |
| 12 | 397159775 |
| 13 | 3395598337 |
| 14 | 15081612629 |
| 15 | 128943316987 |
| 16 | 572704120127 |
| 17 | 4896450447169 |
| 18 | 21747674952197 |
| 19 | 185936173675435 |
| 20 | 825838944063359 |
| 21 | 7060678149219361 |
| 22 | 31360132199455445 |