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 | 3 |
| 2 | 4 |
| 3 | 11 |
| 4 | 15 |
| 5 | 26 |
| 6 | 119 |
| 7 | 145 |
| 8 | 264 |
| 9 | 1729 |
| 10 | 1993 |
| 11 | 3722 |
| 12 | 31769 |
| 13 | 35491 |
| 14 | 67260 |
| 15 | 708091 |
| 16 | 775351 |
| 17 | 1483442 |
| 18 | 18576655 |
| 19 | 20060097 |
| 20 | 38636752 |
| 21 | 560974625 |
| 22 | 599611377 |
| 23 | 1160586002 |
| 24 | 19168987409 |
| 25 | 20329573411 |
| 26 | 39498560820 |
| 27 | 731303668171 |
| 28 | 770802228991 |
| 29 | 1502105897162 |
| 30 | 30812920172231 |