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 | 13 |
| 3 | 51 |
| 4 | 61 |
| 5 | 217 |
| 6 | 846 |
| 7 | 291 |
| 8 | 1001 |
| 9 | 3673 |
| 10 | 14637 |
| 11 | 1393 |
| 12 | 4683 |
| 13 | 16693 |
| 14 | 62221 |
| 15 | 247965 |
| 16 | 6673 |
| 17 | 22265 |
| 18 | 77064 |
| 19 | 282317 |
| 20 | 1054081 |
| 21 | 4200768 |
| 22 | 31971 |
| 23 | 106153 |
| 24 | 360517 |
| 25 | 1285131 |
| 26 | 4778353 |
| 27 | 17857153 |
| 28 | 71165091 |