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 | 6 |
| 3 | 18 |
| 4 | 46 |
| 5 | 110 |
| 6 | 254 |
| 7 | 574 |
| 8 | 1278 |
| 9 | 2814 |
| 10 | 6142 |
| 11 | 13310 |
| 12 | 28670 |
| 13 | 61438 |
| 14 | 131070 |
| 15 | 278526 |
| 16 | 589822 |
| 17 | 1245182 |
| 18 | 2621438 |
| 19 | 5505022 |
| 20 | 11534334 |
| 21 | 24117246 |
| 22 | 50331646 |
| 23 | 104857598 |
| 24 | 218103806 |
| 25 | 452984830 |
| 26 | 939524094 |
| 27 | 1946157054 |
| 28 | 4026531838 |
| 29 | 8321499134 |
| 30 | 17179869182 |
| 31 | 35433480190 |
| 32 | 73014444030 |