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 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | 5 |
| 4 | 13 |
| 5 | 33 |
| 6 | 75 |
| 7 | 166 |
| 8 | 358 |
| 9 | 754 |
| 10 | 1564 |
| 11 | 3203 |
| 12 | 6491 |
| 13 | 13043 |
| 14 | 26021 |
| 15 | 51596 |
| 16 | 101772 |
| 17 | 199828 |
| 18 | 390790 |
| 19 | 761537 |
| 20 | 1479337 |
| 21 | 2865589 |
| 22 | 5536719 |
| 23 | 10673010 |
| 24 | 20530866 |
| 25 | 39417766 |
| 26 | 75545728 |
| 27 | 144551167 |
| 28 | 276172727 |
| 29 | 526908583 |
| 30 | 1003986313 |
| 31 | 1910718488 |
| 32 | 3632257048 |
| 33 | 6897610216 |
| 34 | 13085528650 |
| 35 | 24801630845 |
| 36 | 46966595909 |
| 37 | 88866759433 |