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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 3 |
| 7 | 12 |
| 8 | 18 |
| 9 | 24 |
| 10 | 75 |
| 11 | 180 |
| 12 | 295 |
| 13 | 620 |
| 14 | 1612 |
| 15 | 3365 |
| 16 | 6580 |
| 17 | 15365 |
| 18 | 35728 |
| 19 | 74906 |
| 20 | 163099 |
| 21 | 379242 |
| 22 | 848148 |
| 23 | 1848693 |
| 24 | 4187193 |
| 25 | 9583209 |
| 26 | 21417924 |
| 27 | 48067371 |
| 28 | 109877922 |
| 29 | 250010451 |
| 30 | 564688551 |
| 31 | 1286128272 |
| 32 | 2944963788 |
| 33 | 6714338592 |
| 34 | 15313680087 |
| 35 | 35108572386 |