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 | 4 |
| 2 | 14 |
| 3 | 39 |
| 4 | 101 |
| 5 | 238 |
| 6 | 533 |
| 7 | 1131 |
| 8 | 2314 |
| 9 | 4566 |
| 10 | 8763 |
| 11 | 16376 |
| 12 | 29939 |
| 13 | 53612 |
| 14 | 94302 |
| 15 | 163112 |
| 16 | 277953 |
| 17 | 467064 |
| 18 | 774943 |
| 19 | 1270528 |
| 20 | 2060331 |
| 21 | 3306771 |
| 22 | 5256579 |
| 23 | 8280649 |
| 24 | 12934125 |
| 25 | 20040761 |
| 26 | 30817437 |
| 27 | 47048638 |
| 28 | 71339593 |
| 29 | 107469716 |
| 30 | 160898163 |