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 | 3 |
| 2 | 2 |
| 3 | 5 |
| 4 | 10 |
| 5 | 24 |
| 6 | 49 |
| 7 | 112 |
| 8 | 240 |
| 9 | 534 |
| 10 | 1175 |
| 11 | 2626 |
| 12 | 5848 |
| 13 | 13153 |
| 14 | 29594 |
| 15 | 66955 |
| 16 | 151814 |
| 17 | 345494 |
| 18 | 788049 |
| 19 | 1802675 |
| 20 | 4132469 |
| 21 | 9495242 |
| 22 | 21859912 |
| 23 | 50423465 |
| 24 | 116511119 |
| 25 | 269666586 |
| 26 | 625101288 |
| 27 | 1451128164 |
| 28 | 3373250909 |
| 29 | 7851415835 |