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 | 0 |
| 3 | 3 |
| 4 | 4 |
| 5 | 10 |
| 6 | 12 |
| 7 | 28 |
| 8 | 40 |
| 9 | 72 |
| 10 | 110 |
| 11 | 198 |
| 12 | 300 |
| 13 | 520 |
| 14 | 812 |
| 15 | 1350 |
| 16 | 2160 |
| 17 | 3570 |
| 18 | 5688 |
| 19 | 9348 |
| 20 | 15000 |
| 21 | 24444 |
| 22 | 39402 |
| 23 | 64078 |
| 24 | 103320 |
| 25 | 167750 |
| 26 | 270920 |
| 27 | 439128 |
| 28 | 709800 |
| 29 | 1149850 |
| 30 | 1859010 |
| 31 | 3010348 |
| 32 | 4868640 |
| 33 | 7880994 |
| 34 | 12748470 |
| 35 | 20633200 |
| 36 | 33379200 |
| 37 | 54018520 |
| 38 | 87394452 |
| 39 | 141421800 |