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) |
|---|---|
| 0 | 16 |
| 1 | 33 |
| 2 | 67 |
| 3 | 135 |
| 4 | 271 |
| 5 | 543 |
| 6 | 1087 |
| 7 | 2175 |
| 8 | 4351 |
| 9 | 8703 |
| 10 | 17407 |
| 11 | 34815 |
| 12 | 69631 |
| 13 | 139263 |
| 14 | 278527 |
| 15 | 557055 |
| 16 | 1114111 |
| 17 | 2228223 |
| 18 | 4456447 |
| 19 | 8912895 |
| 20 | 17825791 |
| 21 | 35651583 |
| 22 | 71303167 |
| 23 | 142606335 |
| 24 | 285212671 |
| 25 | 570425343 |
| 26 | 1140850687 |
| 27 | 2281701375 |
| 28 | 4563402751 |
| 29 | 9126805503 |
| 30 | 18253611007 |