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 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 10 |
| 5 | 22 |
| 6 | 47 |
| 7 | 100 |
| 8 | 216 |
| 9 | 465 |
| 10 | 1000 |
| 11 | 2155 |
| 12 | 4642 |
| 13 | 10000 |
| 14 | 21545 |
| 15 | 46416 |
| 16 | 100000 |
| 17 | 215444 |
| 18 | 464159 |
| 19 | 1000000 |
| 20 | 2154435 |
| 21 | 4641589 |
| 22 | 10000000 |
| 23 | 21544347 |
| 24 | 46415889 |
| 25 | 100000000 |
| 26 | 215443470 |
| 27 | 464158884 |
| 28 | 1000000000 |
| 29 | 2154434691 |
| 30 | 4641588834 |