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 | 5 |
| 2 | 80 |
| 3 | 1210 |
| 4 | 29205 |
| 5 | 782595 |
| 6 | 27002800 |
| 7 | 1058476100 |
| 8 | 48782479625 |
| 9 | 2522622197425 |
| 10 | 146681902699200 |
| 11 | 9401689444974750 |
| 12 | 661001092169312125 |
| 13 | 50460675421190255375 |
| 14 | 4160330180022220820000 |
| 15 | 368146438283724242989000 |
| 16 | 34808031903090390296900625 |