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 | 73 |
| 2 | 1801 |
| 3 | 3529 |
| 4 | 10369 |
| 5 | 20809 |
| 6 | 103969 |
| 7 | 115201 |
| 8 | 426889 |
| 9 | 649801 |
| 10 | 2080801 |
| 11 | 2205001 |
| 12 | 2654209 |
| 13 | 3266569 |
| 14 | 3328201 |
| 15 | 4428289 |
| 16 | 5171329 |
| 17 | 10017289 |
| 18 | 10672201 |
| 19 | 11347849 |
| 20 | 14709889 |
| 21 | 21780001 |
| 22 | 22177801 |
| 23 | 28395649 |
| 24 | 29675809 |
| 25 | 30701449 |
| 26 | 32320801 |
| 27 | 35583049 |
| 28 | 40176649 |
| 29 | 41368609 |