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) |
|---|---|
| 4 | 3 |
| 5 | 7 |
| 6 | 18 |
| 7 | 47 |
| 8 | 120 |
| 9 | 291 |
| 10 | 661 |
| 11 | 1404 |
| 12 | 2801 |
| 13 | 5283 |
| 14 | 9484 |
| 15 | 16305 |
| 16 | 26990 |
| 17 | 43215 |
| 18 | 67191 |
| 19 | 101782 |
| 20 | 150639 |
| 21 | 218351 |
| 22 | 310614 |
| 23 | 434419 |
| 24 | 598260 |
| 25 | 812363 |
| 26 | 1088937 |
| 27 | 1442448 |
| 28 | 1889917 |
| 29 | 2451243 |
| 30 | 3149552 |
| 31 | 4011573 |
| 32 | 5068042 |
| 33 | 6354135 |
| 34 | 7909931 |
| 35 | 9780906 |
| 36 | 12018459 |
| 37 | 14680471 |
| 38 | 17831898 |
| 39 | 21545399 |
| 40 | 25902000 |
| 41 | 30991795 |