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 | 2 |
| 1 | 22 |
| 2 | 202 |
| 3 | 1822 |
| 4 | 16402 |
| 5 | 147622 |
| 6 | 1328602 |
| 7 | 11957422 |
| 8 | 107616802 |
| 9 | 968551222 |
| 10 | 8716961002 |
| 11 | 78452649022 |
| 12 | 706073841202 |
| 13 | 6354664570822 |
| 14 | 57191981137402 |
| 15 | 514727830236622 |
| 16 | 4632550472129602 |
| 17 | 41692954249166422 |
| 18 | 375236588242497802 |
| 19 | 3377129294182480222 |