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 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 15 |
| 7 | 30 |
| 8 | 57 |
| 9 | 111 |
| 10 | 214 |
| 11 | 415 |
| 12 | 798 |
| 13 | 1547 |
| 14 | 2983 |
| 15 | 5765 |
| 16 | 11132 |
| 17 | 21510 |
| 18 | 41528 |
| 19 | 80231 |
| 20 | 154940 |
| 21 | 299280 |
| 22 | 578017 |
| 23 | 1116450 |
| 24 | 2156280 |
| 25 | 4164827 |
| 26 | 8044023 |
| 27 | 15536655 |
| 28 | 30007988 |
| 29 | 57958900 |
| 30 | 111943844 |
| 31 | 216213363 |
| 32 | 417602892 |
| 33 | 806575889 |
| 34 | 1557852990 |