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 | 2 |
| 3 | 6 |
| 4 | 14 |
| 5 | 32 |
| 6 | 68 |
| 7 | 142 |
| 8 | 276 |
| 9 | 542 |
| 10 | 1022 |
| 11 | 1876 |
| 12 | 3394 |
| 13 | 6066 |
| 14 | 10628 |
| 15 | 18412 |
| 16 | 31344 |
| 17 | 52868 |
| 18 | 88370 |
| 19 | 146180 |
| 20 | 239310 |
| 21 | 388370 |
| 22 | 624688 |
| 23 | 997586 |
| 24 | 1582640 |
| 25 | 2493908 |
| 26 | 3902574 |
| 27 | 6069194 |
| 28 | 9378078 |
| 29 | 14411150 |
| 30 | 22034860 |
| 31 | 33520642 |
| 32 | 50747992 |
| 33 | 76471200 |
| 34 | 114689926 |
| 35 | 171242092 |
| 36 | 254587046 |
| 37 | 376981800 |
| 38 | 556129468 |
| 39 | 817412048 |
| 40 | 1197096472 |
| 41 | 1747047580 |