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 | 0 |
| 2 | 162 |
| 3 | 4374 |
| 4 | 78732 |
| 5 | 1180980 |
| 6 | 15943230 |
| 7 | 200884698 |
| 8 | 2410616376 |
| 9 | 27894275208 |
| 10 | 313810596090 |
| 11 | 3451916556990 |
| 12 | 37280698815492 |
| 13 | 396531069219324 |
| 14 | 4163576226802902 |
| 15 | 43237137739876290 |
| 16 | 444724845324441840 |