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 | 176 |
| 4 | 2951 |
| 5 | 22535 |
| 6 | 112435 |
| 7 | 426475 |
| 8 | 1333906 |
| 9 | 3614226 |
| 10 | 8762370 |
| 11 | 19439970 |
| 12 | 40113425 |
| 13 | 77924561 |
| 14 | 143844701 |
| 15 | 254168005 |
| 16 | 432404980 |
| 17 | 711642100 |
| 18 | 1137438516 |
| 19 | 1771335876 |
| 20 | 2695062315 |
| 21 | 4015516715 |
| 22 | 5870624375 |
| 23 | 8436160271 |
| 24 | 11933641126 |
| 25 | 16639392550 |
| 26 | 22894902550 |
| 27 | 31118577750 |