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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 24 |
| 5 | 112 |
| 6 | 544 |
| 7 | 2368 |
| 8 | 9328 |
| 9 | 34802 |
| 10 | 129064 |
| 11 | 491768 |
| 12 | 1938336 |
| 13 | 7801744 |
| 14 | 31553344 |
| 15 | 127083328 |
| 16 | 509145568 |
| 17 | 2035437440 |
| 18 | 8148505828 |
| 19 | 32728127192 |
| 20 | 131880275664 |
| 21 | 532597541344 |
| 22 | 2153312518240 |
| 23 | 8710505815360 |
| 24 | 35250721087168 |
| 25 | 142743029326162 |
| 26 | 578472382307304 |