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 | 80 |
| 3 | 999 |
| 4 | 16640 |
| 5 | 233207 |
| 6 | 2939328 |
| 7 | 35714159 |
| 8 | 429719552 |
| 9 | 5159248911 |
| 10 | 61916364224 |
| 11 | 743006599127 |
| 12 | 8916097462272 |
| 13 | 106993200552263 |
| 14 | 1283918457019328 |
| 15 | 15407021563195743 |
| 16 | 184884258878259200 |