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 | 1 |
| 3 | 5 |
| 4 | 5 |
| 5 | 17 |
| 6 | 25 |
| 7 | 61 |
| 8 | 109 |
| 9 | 233 |
| 10 | 449 |
| 11 | 917 |
| 12 | 1813 |
| 13 | 3649 |
| 14 | 7273 |
| 15 | 14573 |
| 16 | 29117 |
| 17 | 58265 |
| 18 | 116497 |
| 19 | 233029 |
| 20 | 466021 |
| 21 | 932081 |
| 22 | 1864121 |
| 23 | 3728285 |
| 24 | 7456525 |
| 25 | 14913097 |
| 26 | 29826145 |
| 27 | 59652341 |
| 28 | 119304629 |
| 29 | 238609313 |
| 30 | 477218569 |
| 31 | 954437197 |
| 32 | 1908874333 |
| 33 | 3817748729 |