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 | 0 |
| 1 | 1 |
| 2 | 13 |
| 3 | 170 |
| 4 | 2223 |
| 5 | 29069 |
| 6 | 380120 |
| 7 | 4970629 |
| 8 | 64998297 |
| 9 | 849948490 |
| 10 | 11114328667 |
| 11 | 145336221161 |
| 12 | 1900485203760 |
| 13 | 24851643870041 |
| 14 | 324971855514293 |
| 15 | 4249485765555850 |
| 16 | 55568286807740343 |
| 17 | 726637214266180309 |