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 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 8 |
| 7 | 16 |
| 8 | 32 |
| 9 | 64 |
| 10 | 130 |
| 11 | 264 |
| 12 | 538 |
| 13 | 1104 |
| 14 | 2272 |
| 15 | 4692 |
| 16 | 9730 |
| 17 | 20236 |
| 18 | 42208 |
| 19 | 88288 |
| 20 | 185126 |
| 21 | 389072 |
| 22 | 819458 |
| 23 | 1729296 |
| 24 | 3655936 |
| 25 | 7742124 |
| 26 | 16420928 |
| 27 | 34879040 |
| 28 | 74185364 |
| 29 | 157986068 |
| 30 | 336845482 |
| 31 | 718988144 |
| 32 | 1536250336 |
| 33 | 3285674088 |
| 34 | 7033709954 |
| 35 | 15070204524 |