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 | 540 |
| 2 | 1008 |
| 3 | 2032 |
| 4 | 4338 |
| 5 | 9297 |
| 6 | 19263 |
| 7 | 38010 |
| 8 | 73278 |
| 9 | 143045 |
| 10 | 288057 |
| 11 | 594045 |
| 12 | 1228136 |
| 13 | 2495244 |
| 14 | 4970793 |
| 15 | 9823140 |
| 16 | 19533636 |
| 17 | 39362880 |
| 18 | 80112560 |
| 19 | 163010352 |
| 20 | 329127561 |
| 21 | 659192991 |
| 22 | 1316427636 |
| 23 | 2637095196 |
| 24 | 5313657069 |
| 25 | 10747592751 |
| 26 | 21727946097 |