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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 148 |
| 7 | 1459 |
| 8 | 7816 |
| 9 | 30252 |
| 10 | 94800 |
| 11 | 256782 |
| 12 | 617856 |
| 13 | 1366224 |
| 14 | 2795748 |
| 15 | 5412325 |
| 16 | 9923416 |
| 17 | 17486008 |
| 18 | 29560632 |
| 19 | 48570684 |
| 20 | 77244360 |
| 21 | 120061344 |
| 22 | 182023572 |
| 23 | 270840423 |
| 24 | 394457656 |
| 25 | 566591620 |