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 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 24 |
| 6 | 49 |
| 7 | 91 |
| 8 | 179 |
| 9 | 341 |
| 10 | 664 |
| 11 | 1280 |
| 12 | 2503 |
| 13 | 4872 |
| 14 | 9557 |
| 15 | 18750 |
| 16 | 36927 |
| 17 | 72800 |
| 18 | 143880 |
| 19 | 284660 |
| 20 | 564093 |
| 21 | 1118911 |
| 22 | 2221834 |
| 23 | 4415417 |
| 24 | 8781591 |
| 25 | 17476099 |
| 26 | 34799199 |
| 27 | 69327512 |
| 28 | 138176461 |
| 29 | 275503854 |
| 30 | 549502119 |
| 31 | 1096327380 |
| 32 | 2187894634 |
| 33 | 4367310138 |
| 34 | 8719509111 |