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 | 130 |
| 2 | 3526 |
| 3 | 41682 |
| 4 | 315124 |
| 5 | 1771012 |
| 6 | 8008548 |
| 7 | 30627033 |
| 8 | 102479569 |
| 9 | 307435001 |
| 10 | 842078930 |
| 11 | 2135465204 |
| 12 | 5069027730 |
| 13 | 11361881611 |
| 14 | 24219158218 |
| 15 | 49385314943 |
| 16 | 96803565005 |
| 17 | 183160193142 |
| 18 | 335692581558 |
| 19 | 597766839750 |
| 20 | 1036890170376 |