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 | 512 |
| 1 | 1000000000 |
| 2 | 198359290368 |
| 3 | 5429503678976 |
| 4 | 60716992766464 |
| 5 | 406671383849472 |
| 6 | 1953125000000000 |
| 7 | 7427658739644928 |
| 8 | 23762680013799936 |
| 9 | 66540410775079424 |
| 10 | 167619550409708032 |
| 11 | 387420489000000000 |
| 12 | 833747762130149888 |
| 13 | 1689478959002692096 |
| 14 | 3251948521156637184 |
| 15 | 5987402799531080192 |