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 | 120 |
| 2 | 229 |
| 3 | 442 |
| 4 | 856 |
| 5 | 1656 |
| 6 | 3204 |
| 7 | 6192 |
| 8 | 11955 |
| 9 | 23088 |
| 10 | 44617 |
| 11 | 86226 |
| 12 | 166620 |
| 13 | 321960 |
| 14 | 622104 |
| 15 | 1202016 |
| 16 | 2322567 |
| 17 | 4487848 |
| 18 | 8671757 |
| 19 | 16756074 |
| 20 | 32377024 |
| 21 | 62560664 |
| 22 | 120883084 |
| 23 | 233577104 |
| 24 | 451331323 |
| 25 | 872088416 |
| 26 | 1685098737 |
| 27 | 3256043394 |