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 | 22 |
| 2 | 242 |
| 3 | 1782 |
| 4 | 9922 |
| 5 | 44726 |
| 6 | 170610 |
| 7 | 568150 |
| 8 | 1690370 |
| 9 | 4573910 |
| 10 | 11414898 |
| 11 | 26572086 |
| 12 | 58227906 |
| 13 | 121023606 |
| 14 | 240089586 |
| 15 | 457018518 |
| 16 | 838478850 |
| 17 | 1488341910 |
| 18 | 2564399090 |
| 19 | 4300978550 |
| 20 | 7039035586 |
| 21 | 11265589302 |
| 22 | 17664712562 |
| 23 | 27182654422 |