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 | 10 |
| 2 | 240 |
| 3 | 2246 |
| 4 | 12656 |
| 5 | 52164 |
| 6 | 173776 |
| 7 | 495820 |
| 8 | 1256992 |
| 9 | 2902702 |
| 10 | 6214208 |
| 11 | 12494482 |
| 12 | 23827440 |
| 13 | 43430088 |
| 14 | 76120288 |
| 15 | 128926232 |
| 16 | 211867328 |
| 17 | 338940050 |
| 18 | 529346384 |
| 19 | 809006814 |
| 20 | 1212404336 |
| 21 | 1784810764 |
| 22 | 2584951600 |
| 23 | 3688170980 |
| 24 | 5190163680 |
| 25 | 7211346870 |
| 26 | 9901950240 |
| 27 | 13447909290 |