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 | 90 |
| 4 | 525 |
| 5 | 2695 |
| 6 | 11011 |
| 7 | 31603 |
| 8 | 71383 |
| 9 | 141151 |
| 10 | 291479 |
| 11 | 599633 |
| 12 | 1031153 |
| 13 | 1739999 |
| 14 | 2674471 |
| 15 | 3563023 |
| 16 | 5034311 |
| 17 | 7789357 |
| 18 | 11254073 |
| 19 | 14709113 |
| 20 | 19441859 |
| 21 | 24655531 |
| 22 | 29890361 |
| 23 | 37814219 |
| 24 | 48436559 |
| 25 | 63771971 |
| 26 | 84577501 |
| 27 | 101918191 |
| 28 | 114651463 |