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 | 8 |
| 2 | 7 |
| 3 | 18 |
| 4 | 30 |
| 5 | 63 |
| 6 | 125 |
| 7 | 257 |
| 8 | 528 |
| 9 | 1085 |
| 10 | 2228 |
| 11 | 4576 |
| 12 | 9401 |
| 13 | 19311 |
| 14 | 39665 |
| 15 | 81476 |
| 16 | 167363 |
| 17 | 343782 |
| 18 | 706162 |
| 19 | 1450533 |
| 20 | 2979557 |
| 21 | 6120333 |
| 22 | 12571820 |
| 23 | 25823881 |
| 24 | 53045060 |
| 25 | 108960300 |
| 26 | 223816249 |
| 27 | 459742831 |
| 28 | 944361613 |
| 29 | 1939821080 |
| 30 | 3984602671 |