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 | 1 |
| 2 | 4 |
| 3 | 10 |
| 4 | 21 |
| 5 | 41 |
| 6 | 78 |
| 7 | 148 |
| 8 | 283 |
| 9 | 547 |
| 10 | 1068 |
| 11 | 2102 |
| 12 | 4161 |
| 13 | 8269 |
| 14 | 16474 |
| 15 | 32872 |
| 16 | 65655 |
| 17 | 131207 |
| 18 | 262296 |
| 19 | 524458 |
| 20 | 1048765 |
| 21 | 2097361 |
| 22 | 4194534 |
| 23 | 8388860 |
| 24 | 16777491 |
| 25 | 33554731 |
| 26 | 67109188 |
| 27 | 134218078 |
| 28 | 268435833 |
| 29 | 536871317 |
| 30 | 1073742258 |
| 31 | 2147484112 |