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 | 5 |
| 2 | 51 |
| 3 | 506 |
| 4 | 510 |
| 5 | 5610 |
| 6 | 51870 |
| 7 | 510510 |
| 8 | 50169210 |
| 9 | 504894390 |
| 10 | 50012172210 |
| 11 | 503520607590 |
| 12 | 50001975553530 |
| 13 | 501601785815130 |
| 14 | 50073188107872930 |
| 15 | 5000089945706645790 |
| 16 | 50617203592231346070 |
| 17 | 5000858931483646541310 |