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) |
|---|---|
| 0 | 1 |
| 1 | 28 |
| 2 | 364 |
| 3 | 2912 |
| 4 | 16044 |
| 5 | 64792 |
| 6 | 200928 |
| 7 | 503360 |
| 8 | 1089452 |
| 9 | 2186940 |
| 10 | 4196920 |
| 11 | 7544992 |
| 12 | 12547808 |
| 13 | 19975256 |
| 14 | 31553344 |
| 15 | 48484800 |
| 16 | 70439852 |
| 17 | 99602104 |
| 18 | 142487436 |
| 19 | 200569824 |
| 20 | 268594872 |
| 21 | 354052608 |
| 22 | 476105504 |
| 23 | 630908096 |
| 24 | 800698080 |
| 25 | 1008274932 |
| 26 | 1296257144 |