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 | 3 |
| 2 | 23 |
| 3 | 23 |
| 4 | 73 |
| 5 | 123 |
| 6 | 243 |
| 7 | 444 |
| 8 | 897 |
| 9 | 1801 |
| 10 | 3462 |
| 11 | 6669 |
| 12 | 13291 |
| 13 | 25762 |
| 14 | 49483 |
| 15 | 97860 |
| 16 | 193033 |
| 17 | 376031 |
| 18 | 735990 |
| 19 | 1440269 |
| 20 | 2815283 |
| 21 | 5522803 |
| 22 | 10827092 |
| 23 | 21196028 |
| 24 | 41505035 |
| 25 | 81298779 |
| 26 | 159266998 |
| 27 | 311969014 |
| 28 | 611140770 |
| 29 | 1197086348 |
| 30 | 2345047342 |
| 31 | 4593936013 |