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 | 7 |
| 2 | 83 |
| 3 | 523 |
| 4 | 4212 |
| 5 | 34319 |
| 6 | 268630 |
| 7 | 2139403 |
| 8 | 17031173 |
| 9 | 135252357 |
| 10 | 1075372808 |
| 11 | 8549266704 |
| 12 | 67957631430 |
| 13 | 540234143744 |
| 14 | 4294582331493 |
| 15 | 34139452686352 |
| 16 | 271390366832563 |
| 17 | 2157405901169113 |
| 18 | 17150197736816326 |
| 19 | 136334743334987807 |