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 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 16 |
| 4 | 40 |
| 5 | 92 |
| 6 | 193 |
| 7 | 401 |
| 8 | 812 |
| 9 | 1632 |
| 10 | 3261 |
| 11 | 6526 |
| 12 | 13030 |
| 13 | 26049 |
| 14 | 52013 |
| 15 | 103974 |
| 16 | 207797 |
| 17 | 415496 |
| 18 | 830636 |
| 19 | 1661086 |
| 20 | 3321498 |
| 21 | 6642591 |
| 22 | 13283920 |
| 23 | 26567121 |
| 24 | 53131653 |
| 25 | 106261922 |
| 26 | 212518857 |
| 27 | 425034976 |
| 28 | 850060303 |
| 29 | 1700115399 |
| 30 | 3400211408 |
| 31 | 6800412866 |
| 32 | 13600787296 |