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 | 0 |
| 2 | 6 |
| 3 | 28 |
| 4 | 96 |
| 5 | 252 |
| 6 | 550 |
| 7 | 1056 |
| 8 | 1848 |
| 9 | 3016 |
| 10 | 4662 |
| 11 | 6900 |
| 12 | 9856 |
| 13 | 13668 |
| 14 | 18486 |
| 15 | 24472 |
| 16 | 31800 |
| 17 | 40656 |
| 18 | 51238 |
| 19 | 63756 |
| 20 | 78432 |
| 21 | 95500 |
| 22 | 115206 |
| 23 | 137808 |
| 24 | 163576 |
| 25 | 192792 |
| 26 | 225750 |
| 27 | 262756 |
| 28 | 304128 |
| 29 | 350196 |
| 30 | 401302 |
| 31 | 457800 |
| 32 | 520056 |
| 33 | 588448 |
| 34 | 663366 |