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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 16 |
| 5 | 48 |
| 6 | 192 |
| 7 | 704 |
| 8 | 3072 |
| 9 | 12032 |
| 10 | 52736 |
| 11 | 219136 |
| 12 | 985088 |
| 13 | 4218880 |
| 14 | 19144704 |
| 15 | 84066304 |
| 16 | 387088384 |
| 17 | 1725497344 |
| 18 | 7989886976 |
| 19 | 36128948224 |
| 20 | 168658206720 |
| 21 | 770103574528 |
| 22 | 3611291549696 |
| 23 | 16636941697024 |
| 24 | 78453223194624 |
| 25 | 363787840389120 |
| 26 | 1721209150504960 |