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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 15 |
| 6 | 33 |
| 7 | 74 |
| 8 | 160 |
| 9 | 344 |
| 10 | 731 |
| 11 | 1544 |
| 12 | 3237 |
| 13 | 6753 |
| 14 | 14022 |
| 15 | 29009 |
| 16 | 59819 |
| 17 | 123010 |
| 18 | 252341 |
| 19 | 516560 |
| 20 | 1055476 |
| 21 | 2153115 |
| 22 | 4385889 |
| 23 | 8922556 |
| 24 | 18131000 |
| 25 | 36805009 |
| 26 | 74643126 |
| 27 | 151255021 |
| 28 | 306267833 |
| 29 | 619719217 |
| 30 | 1253191291 |
| 31 | 2532750315 |
| 32 | 5116124712 |
| 33 | 10329574480 |