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 | 36 |
| 3 | 1828 |
| 4 | 40136 |
| 5 | 693960 |
| 6 | 11000300 |
| 7 | 168594156 |
| 8 | 2550000528 |
| 9 | 38371094416 |
| 10 | 576250000820 |
| 11 | 8647558594740 |
| 12 | 129734375001176 |
| 13 | 1946130371095128 |
| 14 | 29192578125001596 |
| 15 | 437892028808595580 |
| 16 | 6568398437500002080 |
| 17 | 98526072692871096096 |
| 18 | 1477891601562500002628 |