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 | 2 |
| 4 | 3 |
| 5 | 5 |
| 6 | 10 |
| 7 | 18 |
| 8 | 36 |
| 9 | 71 |
| 10 | 140 |
| 11 | 280 |
| 12 | 557 |
| 13 | 1111 |
| 14 | 2218 |
| 15 | 4432 |
| 16 | 8859 |
| 17 | 17710 |
| 18 | 35412 |
| 19 | 70812 |
| 20 | 141605 |
| 21 | 283197 |
| 22 | 566364 |
| 23 | 1132695 |
| 24 | 2265363 |
| 25 | 4530659 |
| 26 | 9061259 |
| 27 | 18122454 |
| 28 | 36244783 |
| 29 | 72489435 |
| 30 | 144978745 |
| 31 | 289957235 |
| 32 | 579914215 |
| 33 | 1159828166 |
| 34 | 2319655810 |
| 35 | 4639311084 |
| 36 | 9278621655 |