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 | 6 |
| 3 | 15 |
| 4 | 37 |
| 5 | 85 |
| 6 | 192 |
| 7 | 414 |
| 8 | 879 |
| 9 | 1816 |
| 10 | 3694 |
| 11 | 7362 |
| 12 | 14480 |
| 13 | 28037 |
| 14 | 53644 |
| 15 | 101379 |
| 16 | 189587 |
| 17 | 350874 |
| 18 | 643431 |
| 19 | 1169388 |
| 20 | 2108045 |
| 21 | 3770430 |
| 22 | 6694894 |
| 23 | 11804968 |
| 24 | 20679720 |
| 25 | 35999794 |
| 26 | 62298755 |
| 27 | 107198541 |
| 28 | 183462856 |
| 29 | 312357002 |
| 30 | 529173060 |
| 31 | 892216829 |
| 32 | 1497454396 |
| 33 | 2502190992 |