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 | 1 |
| 2 | 5 |
| 3 | 9 |
| 4 | 28 |
| 5 | 76 |
| 6 | 177 |
| 7 | 367 |
| 8 | 774 |
| 9 | 1684 |
| 10 | 3639 |
| 11 | 7597 |
| 12 | 15617 |
| 13 | 32101 |
| 14 | 66074 |
| 15 | 135096 |
| 16 | 274104 |
| 17 | 553668 |
| 18 | 1116275 |
| 19 | 2245277 |
| 20 | 4501938 |
| 21 | 9000074 |
| 22 | 17953486 |
| 23 | 35749382 |
| 24 | 71056212 |
| 25 | 140977366 |
| 26 | 279246077 |
| 27 | 552333115 |
| 28 | 1091040731 |