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 | 2 |
| 2 | 16 |
| 3 | 208 |
| 4 | 1120 |
| 5 | 10736 |
| 6 | 24752 |
| 7 | 94656 |
| 8 | 165072 |
| 9 | 429088 |
| 10 | 1367408 |
| 11 | 1908608 |
| 12 | 4622928 |
| 13 | 7723744 |
| 14 | 9800560 |
| 15 | 15289664 |
| 16 | 27879696 |
| 17 | 47661616 |
| 18 | 56306416 |
| 19 | 90008336 |
| 20 | 120281952 |
| 21 | 138204768 |
| 22 | 205137088 |
| 23 | 262602704 |
| 24 | 372270624 |
| 25 | 572489344 |
| 26 | 700673360 |
| 27 | 772849376 |