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 | 3 |
| 2 | 7 |
| 3 | 12 |
| 4 | 31 |
| 5 | 42 |
| 6 | 124 |
| 7 | 224 |
| 8 | 511 |
| 9 | 847 |
| 10 | 1953 |
| 11 | 2688 |
| 12 | 12264 |
| 13 | 18816 |
| 14 | 29127 |
| 15 | 72540 |
| 16 | 131071 |
| 17 | 195048 |
| 18 | 558523 |
| 19 | 1077440 |
| 20 | 3164112 |
| 21 | 4552020 |
| 22 | 10890040 |
| 23 | 10342080 |
| 24 | 54525848 |
| 25 | 73260781 |
| 26 | 155671040 |
| 27 | 318848400 |
| 28 | 1080311232 |
| 29 | 964580240 |
| 30 | 3070642080 |
| 31 | 4340711424 |
| 32 | 13722819600 |
| 33 | 19039027200 |