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 | 1 |
| 4 | 3 |
| 5 | 6 |
| 6 | 13 |
| 7 | 21 |
| 8 | 41 |
| 9 | 67 |
| 10 | 111 |
| 11 | 175 |
| 12 | 286 |
| 13 | 419 |
| 14 | 643 |
| 15 | 938 |
| 16 | 1370 |
| 17 | 1939 |
| 18 | 2779 |
| 19 | 3819 |
| 20 | 5293 |
| 21 | 7191 |
| 22 | 9752 |
| 23 | 12991 |
| 24 | 17321 |
| 25 | 22641 |
| 26 | 29687 |
| 27 | 38533 |
| 28 | 49796 |
| 29 | 63621 |
| 30 | 81300 |
| 31 | 102807 |
| 32 | 129787 |
| 33 | 162833 |
| 34 | 203642 |
| 35 | 252898 |
| 36 | 313666 |
| 37 | 386601 |
| 38 | 475540 |
| 39 | 582216 |
| 40 | 710688 |
| 41 | 863552 |
| 42 | 1048176 |