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 | 0 |
| 2 | 24 |
| 3 | 476 |
| 4 | 6739 |
| 5 | 82401 |
| 6 | 902608 |
| 7 | 9394517 |
| 8 | 96122290 |
| 9 | 975700392 |
| 10 | 9854082822 |
| 11 | 99180099587 |
| 12 | 995679223590 |
| 13 | 9977627937023 |
| 14 | 99879659224379 |
| 15 | 999321444658475 |
| 16 | 9996118748668338 |
| 17 | 99978099721506172 |
| 18 | 999879067589400315 |
| 19 | 9999346524827012003 |
| 20 | 99996542810942397874 |