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 | 7 |
| 2 | 28 |
| 3 | 176 |
| 4 | 944 |
| 5 | 4206 |
| 6 | 15798 |
| 7 | 51768 |
| 8 | 151393 |
| 9 | 403131 |
| 10 | 991692 |
| 11 | 2280620 |
| 12 | 4948566 |
| 13 | 10208256 |
| 14 | 20143302 |
| 15 | 38215998 |
| 16 | 70007951 |
| 17 | 124283183 |
| 18 | 214475760 |
| 19 | 360744276 |
| 20 | 592751998 |
| 21 | 953388836 |
| 22 | 1503671490 |
| 23 | 2329136950 |
| 24 | 3548069499 |
| 25 | 5322005825 |