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 | 2 |
| 2 | 3 |
| 3 | 6 |
| 4 | 11 |
| 5 | 21 |
| 6 | 42 |
| 7 | 83 |
| 8 | 167 |
| 9 | 341 |
| 10 | 697 |
| 11 | 1437 |
| 12 | 2983 |
| 13 | 6211 |
| 14 | 12996 |
| 15 | 27304 |
| 16 | 57528 |
| 17 | 121601 |
| 18 | 257759 |
| 19 | 547652 |
| 20 | 1166299 |
| 21 | 2489010 |
| 22 | 5321780 |
| 23 | 11398972 |
| 24 | 24456235 |
| 25 | 52549847 |
| 26 | 113077188 |
| 27 | 243645011 |
| 28 | 525630690 |
| 29 | 1135309380 |
| 30 | 2454863253 |
| 31 | 5313639848 |
| 32 | 11512892983 |
| 33 | 24967852309 |