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) |
|---|---|
| 0 | 1 |
| 1 | 50 |
| 2 | 887 |
| 3 | 8790 |
| 4 | 59542 |
| 5 | 307960 |
| 6 | 1301610 |
| 7 | 4701698 |
| 8 | 14975675 |
| 9 | 43025762 |
| 10 | 113414717 |
| 11 | 277904900 |
| 12 | 639562508 |
| 13 | 1393844960 |
| 14 | 2896063220 |
| 15 | 5768600412 |
| 16 | 11066514565 |
| 17 | 20526933442 |
| 18 | 36936277875 |
| 19 | 64660182026 |
| 20 | 110394412610 |