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) |
|---|---|
| 3 | 2 |
| 4 | 3 |
| 5 | 14 |
| 6 | 14 |
| 7 | 69 |
| 8 | 97 |
| 9 | 251 |
| 10 | 671 |
| 11 | 1847 |
| 12 | 2111 |
| 13 | 12869 |
| 14 | 33461 |
| 15 | 58343 |
| 16 | 189045 |
| 17 | 841125 |
| 18 | 2207347 |
| 19 | 6651215 |
| 20 | 12781755 |
| 21 | 73096191 |
| 22 | 308508927 |
| 23 | 904926489 |
| 24 | 1727792245 |
| 25 | 7638794959 |
| 26 | 44017642189 |
| 27 | 177969495449 |
| 28 | 522668483639 |
| 29 | 1662245807549 |
| 30 | 4496811662189 |
| 31 | 32142974215379 |