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 | 134217728 |
| 2 | 20661046784 |
| 3 | 512000000000 |
| 4 | 5429503678976 |
| 5 | 35184372088832 |
| 6 | 165216101262848 |
| 7 | 618121839509504 |
| 8 | 1953125000000000 |
| 9 | 5416169448144896 |
| 10 | 13537086546263552 |
| 11 | 31087100296429568 |
| 12 | 66540410775079424 |
| 13 | 134217728000000000 |
| 14 | 257327417311663616 |
| 15 | 472161363286556672 |