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 | 31 |
| 2 | 121 |
| 3 | 271 |
| 4 | 481 |
| 5 | 751 |
| 6 | 1081 |
| 7 | 1471 |
| 8 | 1921 |
| 9 | 2431 |
| 10 | 3001 |
| 11 | 3631 |
| 12 | 4321 |
| 13 | 5071 |
| 14 | 5881 |
| 15 | 6751 |
| 16 | 7681 |
| 17 | 8671 |
| 18 | 9721 |
| 19 | 10831 |
| 20 | 12001 |
| 21 | 13231 |
| 22 | 14521 |
| 23 | 15871 |
| 24 | 17281 |
| 25 | 18751 |
| 26 | 20281 |
| 27 | 21871 |
| 28 | 23521 |
| 29 | 25231 |
| 30 | 27001 |
| 31 | 28831 |
| 32 | 30721 |
| 33 | 32671 |
| 34 | 34681 |
| 35 | 36751 |
| 36 | 38881 |
| 37 | 41071 |
| 38 | 43321 |
| 39 | 45631 |
| 40 | 48001 |
| 41 | 50431 |