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 | 19683 |
| 2 | 1953125 |
| 3 | 40353607 |
| 4 | 387420489 |
| 5 | 2357947691 |
| 6 | 10604499373 |
| 7 | 38443359375 |
| 8 | 118587876497 |
| 9 | 322687697779 |
| 10 | 794280046581 |
| 11 | 1801152661463 |
| 12 | 3814697265625 |
| 13 | 7625597484987 |
| 14 | 14507145975869 |
| 15 | 26439622160671 |
| 16 | 46411484401953 |
| 17 | 78815638671875 |
| 18 | 129961739795077 |
| 19 | 208728361158759 |