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 | 16 |
| 5 | 59 |
| 6 | 155 |
| 7 | 352 |
| 8 | 738 |
| 9 | 1475 |
| 10 | 2861 |
| 11 | 5444 |
| 12 | 10232 |
| 13 | 19079 |
| 14 | 35395 |
| 15 | 65452 |
| 16 | 120786 |
| 17 | 222615 |
| 18 | 409965 |
| 19 | 754616 |
| 20 | 1388592 |
| 21 | 2554723 |
| 22 | 4699643 |
| 23 | 8644840 |
| 24 | 15901266 |
| 25 | 29247995 |
| 26 | 53796541 |
| 27 | 98948444 |
| 28 | 181995832 |
| 29 | 334743887 |
| 30 | 615691459 |
| 31 | 1132434708 |