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 | 19487171 |
| 2 | 2494357888 |
| 3 | 42618442977 |
| 4 | 319277809664 |
| 5 | 1522435234375 |
| 6 | 5455160701056 |
| 7 | 16048523266853 |
| 8 | 40867559636992 |
| 9 | 93206534790699 |
| 10 | 194871710000000 |
| 11 | 379749833583241 |
| 12 | 698260569735168 |
| 13 | 1222791080775407 |