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) |
|---|---|
| 1 | 729 |
| 2 | 69984 |
| 3 | 615481 |
| 4 | 2717759 |
| 5 | 9829605 |
| 6 | 33934344 |
| 7 | 118317987 |
| 8 | 416543502 |
| 9 | 1454734611 |
| 10 | 4952178320 |
| 11 | 16233385381 |
| 12 | 50895787205 |
| 13 | 152210262323 |
| 14 | 434202798968 |
| 15 | 1183383351150 |
| 16 | 3089018682146 |
| 17 | 7745205810204 |
| 18 | 18709904381707 |
| 19 | 43674432900423 |