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 | 7 |
| 2 | 73 |
| 3 | 703 |
| 4 | 6481 |
| 5 | 58807 |
| 6 | 530713 |
| 7 | 4780783 |
| 8 | 43040161 |
| 9 | 387400807 |
| 10 | 3486725353 |
| 11 | 31380882463 |
| 12 | 282429005041 |
| 13 | 2541864234007 |
| 14 | 22876787671993 |
| 15 | 205891117745743 |
| 16 | 1853020145805121 |
| 17 | 16677181570526407 |
| 18 | 150094634909578633 |