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 | 16 |
| 2 | 230 |
| 3 | 3564 |
| 4 | 61845 |
| 5 | 1207696 |
| 6 | 26415840 |
| 7 | 642448632 |
| 8 | 17240108314 |
| 9 | 506777596248 |
| 10 | 16210958231104 |
| 11 | 560988459704192 |
| 12 | 20891752852722701 |
| 13 | 833382707754108896 |
| 14 | 35461362393617267808 |
| 15 | 1603581518693484768464 |