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 | 27 |
| 3 | 39 |
| 4 | 83 |
| 5 | 203 |
| 6 | 395 |
| 7 | 467 |
| 8 | 875 |
| 9 | 1979 |
| 10 | 6939 |
| 11 | 13623 |
| 12 | 22835 |
| 13 | 56307 |
| 14 | 81839 |
| 15 | 197783 |
| 16 | 224879 |
| 17 | 261147 |
| 18 | 523283 |
| 19 | 533043 |
| 20 | 2457639 |