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 | 4 |
| 2 | 8 |
| 3 | 16 |
| 4 | 44 |
| 5 | 92 |
| 6 | 256 |
| 7 | 536 |
| 8 | 1492 |
| 9 | 3124 |
| 10 | 8696 |
| 11 | 18208 |
| 12 | 50684 |
| 13 | 106124 |
| 14 | 295408 |
| 15 | 618536 |
| 16 | 1721764 |
| 17 | 3605092 |
| 18 | 10035176 |
| 19 | 21012016 |
| 20 | 58489292 |
| 21 | 122467004 |
| 22 | 340900576 |
| 23 | 713790008 |
| 24 | 1986914164 |
| 25 | 4160273044 |
| 26 | 11580584408 |
| 27 | 24247848256 |
| 28 | 67496592284 |