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 | 11 |
| 2 | 143 |
| 3 | 2145 |
| 4 | 36465 |
| 5 | 692835 |
| 6 | 14549535 |
| 7 | 334639305 |
| 8 | 8365982625 |
| 9 | 225881530875 |
| 10 | 6550564395375 |
| 11 | 203067496256625 |
| 12 | 6701227376468625 |
| 13 | 234542958176401875 |
| 14 | 8678089452526869375 |
| 15 | 338445488648547905625 |
| 16 | 13876265034590464130625 |