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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 10 |
| 6 | 28 |
| 7 | 48 |
| 8 | 116 |
| 9 | 224 |
| 10 | 480 |
| 11 | 920 |
| 12 | 2000 |
| 13 | 3840 |
| 14 | 7984 |
| 15 | 15936 |
| 16 | 32320 |
| 17 | 63968 |
| 18 | 130176 |
| 19 | 258304 |
| 20 | 521920 |
| 21 | 1041664 |
| 22 | 2089472 |
| 23 | 4171392 |
| 24 | 8377856 |
| 25 | 16726528 |
| 26 | 33509632 |
| 27 | 67004416 |
| 28 | 134129664 |
| 29 | 268111360 |
| 30 | 536705024 |
| 31 | 1072961536 |
| 32 | 2146941952 |
| 33 | 4293509120 |
| 34 | 8588414976 |