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 | 14 |
| 3 | 24 |
| 4 | 14 |
| 5 | 0 |
| 6 | 38 |
| 7 | 168 |
| 8 | 350 |
| 9 | 528 |
| 10 | 854 |
| 11 | 1848 |
| 12 | 4238 |
| 13 | 8736 |
| 14 | 16646 |
| 15 | 31944 |
| 16 | 64190 |
| 17 | 131376 |
| 18 | 265142 |
| 19 | 526680 |
| 20 | 1044974 |
| 21 | 2088768 |
| 22 | 4193126 |
| 23 | 8404200 |
| 24 | 16795166 |
| 25 | 33541200 |
| 26 | 67059734 |
| 27 | 134195064 |
| 28 | 268511054 |
| 29 | 536991840 |
| 30 | 1073711558 |
| 31 | 2147211528 |