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 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 2 |
| 9 | 2 |
| 10 | 4 |
| 11 | 6 |
| 12 | 10 |
| 13 | 16 |
| 14 | 27 |
| 15 | 44 |
| 16 | 74 |
| 17 | 123 |
| 18 | 209 |
| 19 | 353 |
| 20 | 602 |
| 21 | 1026 |
| 22 | 1760 |
| 23 | 3019 |
| 24 | 5203 |
| 25 | 8977 |
| 26 | 15538 |
| 27 | 26930 |
| 28 | 46792 |
| 29 | 81415 |
| 30 | 141939 |
| 31 | 247795 |
| 32 | 433307 |
| 33 | 758672 |
| 34 | 1330219 |
| 35 | 2335086 |
| 36 | 4104064 |
| 37 | 7220937 |
| 38 | 12718694 |
| 39 | 22424283 |
| 40 | 39574443 |
| 41 | 69903759 |
| 42 | 123584852 |
| 43 | 218668323 |