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) |
|---|---|
| 1 | 3 |
| 2 | 3 |
| 3 | 6 |
| 4 | 23 |
| 5 | 43 |
| 6 | 102 |
| 7 | 213 |
| 8 | 447 |
| 9 | 978 |
| 10 | 2083 |
| 11 | 4491 |
| 12 | 9650 |
| 13 | 20699 |
| 14 | 44495 |
| 15 | 95536 |
| 16 | 205215 |
| 17 | 440813 |
| 18 | 946758 |
| 19 | 2033611 |
| 20 | 4367943 |
| 21 | 9381882 |
| 22 | 20151431 |
| 23 | 43283105 |
| 24 | 92967858 |
| 25 | 199685543 |
| 26 | 428904271 |
| 27 | 921243300 |
| 28 | 1978737343 |