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 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 6 |
| 5 | 10 |
| 6 | 27 |
| 7 | 56 |
| 8 | 149 |
| 9 | 352 |
| 10 | 915 |
| 11 | 2285 |
| 12 | 5919 |
| 13 | 15084 |
| 14 | 38908 |
| 15 | 99627 |
| 16 | 255728 |
| 17 | 653113 |
| 18 | 1664892 |
| 19 | 4221090 |
| 20 | 10648018 |
| 21 | 26658710 |
| 22 | 66154031 |
| 23 | 162272380 |
| 24 | 392491903 |
| 25 | 933148405 |
| 26 | 2173804324 |
| 27 | 4943689469 |
| 28 | 10932561700 |
| 29 | 23403033225 |
| 30 | 48251790080 |
| 31 | 95274168428 |