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 | 7 |
| 2 | 112 |
| 3 | 1792 |
| 4 | 28672 |
| 5 | 458752 |
| 6 | 7340032 |
| 7 | 117440512 |
| 8 | 1879048192 |
| 9 | 30064771072 |
| 10 | 481036337152 |
| 11 | 7696581394432 |
| 12 | 123145302310912 |
| 13 | 1970324836974592 |
| 14 | 31525197391593472 |
| 15 | 504403158265495552 |
| 16 | 8070450532247928832 |
| 17 | 129127208515966861312 |
| 18 | 2066035336255469780992 |
| 19 | 33056565380087516495872 |