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 | 19 |
| 2 | 361 |
| 3 | 1799 |
| 4 | 9039 |
| 5 | 55576 |
| 6 | 297702 |
| 7 | 1493661 |
| 8 | 7719181 |
| 9 | 39409874 |
| 10 | 196757286 |
| 11 | 981006372 |
| 12 | 4882898447 |
| 13 | 24159299179 |
| 14 | 119208331512 |
| 15 | 587545141168 |
| 16 | 2890792469683 |
| 17 | 14204090068621 |
| 18 | 69742665957409 |
| 19 | 342219461884514 |