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 | 5 |
| 5 | 14 |
| 6 | 36 |
| 7 | 98 |
| 8 | 327 |
| 9 | 788 |
| 10 | 1890 |
| 11 | 4523 |
| 12 | 11483 |
| 13 | 27209 |
| 14 | 61983 |
| 15 | 139568 |
| 16 | 323531 |
| 17 | 730494 |
| 18 | 1618531 |
| 19 | 3543509 |
| 20 | 7851556 |
| 21 | 17204960 |
| 22 | 37331967 |
| 23 | 80312122 |
| 24 | 173234350 |
| 25 | 372183777 |
| 26 | 794587802 |
| 27 | 1686743710 |
| 28 | 3579347697 |
| 29 | 7578433425 |
| 30 | 15984149737 |
| 31 | 33580700124 |
| 32 | 70467297970 |
| 33 | 147600492302 |