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 | 1 |
| 2 | 5 |
| 3 | 73 |
| 4 | 2069 |
| 5 | 95401 |
| 6 | 6487445 |
| 7 | 610093513 |
| 8 | 75796724309 |
| 9 | 12020754177001 |
| 10 | 2369364111428885 |
| 11 | 568128719132038153 |
| 12 | 162835627057766030549 |
| 13 | 54975855375379966645801 |
| 14 | 21593185551426744571090325 |
| 15 | 9762238510837560633366673993 |
| 16 | 5033241437347149354018370856789 |