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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 5 |
| 6 | 7 |
| 7 | 7 |
| 8 | 19 |
| 9 | 39 |
| 10 | 95 |
| 11 | 187 |
| 12 | 323 |
| 13 | 663 |
| 14 | 1351 |
| 15 | 2755 |
| 16 | 5579 |
| 17 | 10863 |
| 18 | 21679 |
| 19 | 43643 |
| 20 | 87411 |
| 21 | 175399 |
| 22 | 349591 |
| 23 | 697843 |
| 24 | 1397787 |
| 25 | 2796255 |
| 26 | 5595135 |
| 27 | 11187435 |
| 28 | 22362691 |
| 29 | 44735255 |
| 30 | 89480167 |
| 31 | 178966627 |
| 32 | 357936619 |
| 33 | 715798479 |
| 34 | 1431613775 |
| 35 | 2863328347 |
| 36 | 5726658323 |