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 | 117649 |
| 2 | 4826809 |
| 3 | 47045881 |
| 4 | 244140625 |
| 5 | 887503681 |
| 6 | 2565726409 |
| 7 | 6321363049 |
| 8 | 13841287201 |
| 9 | 27680640625 |
| 10 | 51520374361 |
| 11 | 90458382169 |
| 12 | 151334226289 |
| 13 | 243087455521 |
| 14 | 377149515625 |
| 15 | 567869252041 |
| 16 | 832972004929 |
| 17 | 1194052296529 |
| 18 | 1677100110841 |
| 19 | 2313060765625 |
| 20 | 3138428376721 |