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 | 12 |
| 2 | 32 |
| 3 | 88 |
| 4 | 242 |
| 5 | 660 |
| 6 | 1800 |
| 7 | 4920 |
| 8 | 13448 |
| 9 | 36736 |
| 10 | 100352 |
| 11 | 274176 |
| 12 | 749088 |
| 13 | 2046528 |
| 14 | 5591168 |
| 15 | 15275392 |
| 16 | 41733248 |
| 17 | 114017280 |
| 18 | 311500800 |
| 19 | 851036160 |
| 20 | 2325074432 |
| 21 | 6352221184 |
| 22 | 17354590208 |
| 23 | 47413622784 |
| 24 | 129536428032 |
| 25 | 353900101632 |