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 | 10 |
| 2 | 23 |
| 3 | 49 |
| 4 | 101 |
| 5 | 205 |
| 6 | 413 |
| 7 | 829 |
| 8 | 1661 |
| 9 | 3325 |
| 10 | 6653 |
| 11 | 13309 |
| 12 | 26621 |
| 13 | 53245 |
| 14 | 106493 |
| 15 | 212989 |
| 16 | 425981 |
| 17 | 851965 |
| 18 | 1703933 |
| 19 | 3407869 |
| 20 | 6815741 |
| 21 | 13631485 |
| 22 | 27262973 |
| 23 | 54525949 |
| 24 | 109051901 |
| 25 | 218103805 |
| 26 | 436207613 |
| 27 | 872415229 |
| 28 | 1744830461 |
| 29 | 3489660925 |
| 30 | 6979321853 |
| 31 | 13958643709 |