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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 13 |
| 3 | 43 |
| 4 | 129 |
| 5 | 327 |
| 6 | 761 |
| 7 | 1619 |
| 8 | 3238 |
| 9 | 6098 |
| 10 | 10974 |
| 11 | 18930 |
| 12 | 31550 |
| 13 | 50930 |
| 14 | 80030 |
| 15 | 122666 |
| 16 | 183999 |
| 17 | 270525 |
| 18 | 390755 |
| 19 | 555205 |
| 20 | 777287 |
| 21 | 1073297 |
| 22 | 1463583 |
| 23 | 1972533 |
| 24 | 2630044 |
| 25 | 3471508 |
| 26 | 4539660 |
| 27 | 5884564 |
| 28 | 7565868 |
| 29 | 9652788 |
| 30 | 12226860 |
| 31 | 15381924 |