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 | 15 |
| 2 | 353 |
| 3 | 7233 |
| 4 | 271764 |
| 5 | 6436979 |
| 6 | 169838571 |
| 7 | 5145071133 |
| 8 | 121626491919 |
| 9 | 3384817934297 |
| 10 | 91027175836503 |
| 11 | 2222522848709145 |
| 12 | 62148514553083420 |
| 13 | 1602155697723521517 |
| 14 | 41356217735570589779 |
| 15 | 1131174318003611087054 |