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 | 9 |
| 2 | 21 |
| 3 | 37 |
| 4 | 69 |
| 5 | 97 |
| 6 | 137 |
| 7 | 177 |
| 8 | 225 |
| 9 | 293 |
| 10 | 349 |
| 11 | 421 |
| 12 | 489 |
| 13 | 577 |
| 14 | 665 |
| 15 | 749 |
| 16 | 861 |
| 17 | 973 |
| 18 | 1085 |
| 19 | 1201 |
| 20 | 1313 |
| 21 | 1457 |
| 22 | 1597 |
| 23 | 1741 |
| 24 | 1885 |
| 25 | 2053 |
| 26 | 2217 |
| 27 | 2377 |
| 28 | 2561 |
| 29 | 2733 |
| 30 | 2933 |
| 31 | 3125 |
| 32 | 3313 |
| 33 | 3521 |
| 34 | 3745 |
| 35 | 3969 |
| 36 | 4197 |
| 37 | 4421 |
| 38 | 4669 |
| 39 | 4905 |
| 40 | 5169 |
| 41 | 5417 |