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 | 3 |
| 2 | 847 |
| 3 | 45375 |
| 4 | 1770751 |
| 5 | 61871103 |
| 6 | 2063618047 |
| 7 | 67377381375 |
| 8 | 2177548746751 |
| 9 | 70025148104703 |
| 10 | 2246302260789247 |
| 11 | 71969633128677375 |
| 12 | 2304435634414026751 |
| 13 | 73764458297036898303 |
| 14 | 2360822953465975144447 |
| 15 | 75552099118396657893375 |