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) |
|---|---|
| 0 | 1 |
| 1 | 75 |
| 2 | 405 |
| 3 | 1183 |
| 4 | 2601 |
| 5 | 4851 |
| 6 | 8125 |
| 7 | 12615 |
| 8 | 18513 |
| 9 | 26011 |
| 10 | 35301 |
| 11 | 46575 |
| 12 | 60025 |
| 13 | 75843 |
| 14 | 94221 |
| 15 | 115351 |
| 16 | 139425 |
| 17 | 166635 |
| 18 | 197173 |
| 19 | 231231 |
| 20 | 269001 |
| 21 | 310675 |
| 22 | 356445 |
| 23 | 406503 |
| 24 | 461041 |
| 25 | 520251 |
| 26 | 584325 |
| 27 | 653455 |
| 28 | 727833 |
| 29 | 807651 |
| 30 | 893101 |
| 31 | 984375 |