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 | 10 |
| 2 | 125 |
| 3 | 1760 |
| 4 | 26650 |
| 5 | 423752 |
| 6 | 6978510 |
| 7 | 117998400 |
| 8 | 2036685765 |
| 9 | 35738059500 |
| 10 | 635627275767 |
| 11 | 11433154297760 |
| 12 | 207621482341000 |
| 13 | 3801296492623560 |
| 14 | 70092637731997100 |
| 15 | 1300500163756675200 |
| 16 | 24262157874835233000 |
| 17 | 454847339247972377850 |
| 18 | 8564398318045559667475 |