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 | 71 |
| 2 | 281 |
| 3 | 491 |
| 4 | 701 |
| 5 | 2801 |
| 6 | 4481 |
| 7 | 7001 |
| 8 | 7841 |
| 9 | 12251 |
| 10 | 13721 |
| 11 | 17921 |
| 12 | 28001 |
| 13 | 34301 |
| 14 | 54881 |
| 15 | 70001 |
| 16 | 78401 |
| 17 | 85751 |
| 18 | 122501 |
| 19 | 125441 |
| 20 | 137201 |
| 21 | 168071 |
| 22 | 240101 |
| 23 | 280001 |
| 24 | 286721 |
| 25 | 437501 |
| 26 | 490001 |