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) |
|---|---|
| 1 | 1 |
| 2 | 50 |
| 3 | 4851 |
| 4 | 475300 |
| 5 | 46574501 |
| 6 | 4563825750 |
| 7 | 447208348951 |
| 8 | 43821854371400 |
| 9 | 4294094520048201 |
| 10 | 420777441110352250 |
| 11 | 41231895134294472251 |
| 12 | 4040304945719747928300 |
| 13 | 395908652785401002501101 |
| 14 | 38795007668023578497179550 |
| 15 | 3801514842813525291721094751 |