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 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 13 |
| 6 | 28 |
| 7 | 59 |
| 8 | 122 |
| 9 | 248 |
| 10 | 501 |
| 11 | 1009 |
| 12 | 2028 |
| 13 | 4070 |
| 14 | 8159 |
| 15 | 16343 |
| 16 | 32717 |
| 17 | 65472 |
| 18 | 130991 |
| 19 | 262041 |
| 20 | 524157 |
| 21 | 1048410 |
| 22 | 2096943 |
| 23 | 4194043 |
| 24 | 8388285 |
| 25 | 16776819 |
| 26 | 33553946 |
| 27 | 67108270 |
| 28 | 134217002 |
| 29 | 268434568 |
| 30 | 536869825 |
| 31 | 1073740493 |
| 32 | 2147482019 |
| 33 | 4294965305 |
| 34 | 8589932164 |