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 | 225 |
| 3 | 897 |
| 4 | 7905 |
| 5 | 27265 |
| 6 | 61985 |
| 7 | 134225 |
| 8 | 253825 |
| 9 | 537425 |
| 10 | 1015105 |
| 11 | 1613745 |
| 12 | 2587585 |
| 13 | 3562545 |
| 14 | 4925921 |
| 15 | 7485985 |
| 16 | 10837585 |
| 17 | 14816945 |
| 18 | 18923905 |
| 19 | 24289265 |
| 20 | 30135105 |
| 21 | 37040465 |
| 22 | 48281105 |
| 23 | 63033425 |
| 24 | 82430705 |
| 25 | 100968945 |
| 26 | 115087105 |
| 27 | 127426145 |
| 28 | 144189185 |