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 | 30 |
| 2 | 625 |
| 3 | 11250 |
| 4 | 188125 |
| 5 | 3018750 |
| 6 | 47265625 |
| 7 | 728906250 |
| 8 | 11133203125 |
| 9 | 168996093750 |
| 10 | 2554931640625 |
| 11 | 38523925781250 |
| 12 | 579858642578125 |
| 13 | 8717878417968750 |
| 14 | 130968170166015625 |
| 15 | 1966522521972656250 |
| 16 | 29517837677001953125 |
| 17 | 442967564392089843750 |
| 18 | 6646513462066650390625 |