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 | 7215664901 |
| 2 | 1566490153 |
| 3 | 3286060651 |
| 4 | 6060651209 |
| 5 | 9008240243 |
| 6 | 4310421593 |
| 7 | 2159335939 |
| 8 | 9235988057 |
| 9 | 8486772677 |
| 10 | 8070824809 |
| 11 | 2836224173 |
| 12 | 3622417399 |
| 13 | 3997644923 |
| 14 | 2582470949 |
| 15 | 6008735203 |
| 16 | 3151776611 |
| 17 | 5015079847 |
| 18 | 7400299213 |
| 19 | 3139925401 |
| 20 | 3754139549 |
| 21 | 7984234877 |