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 | 4 |
| 2 | 14 |
| 3 | 40 |
| 4 | 104 |
| 5 | 248 |
| 6 | 560 |
| 7 | 1200 |
| 8 | 2474 |
| 9 | 4924 |
| 10 | 9520 |
| 11 | 17928 |
| 12 | 33008 |
| 13 | 59528 |
| 14 | 105408 |
| 15 | 183536 |
| 16 | 314744 |
| 17 | 532208 |
| 18 | 888382 |
| 19 | 1465208 |
| 20 | 2389808 |
| 21 | 3857456 |
| 22 | 6166096 |
| 23 | 9766576 |
| 24 | 15336816 |
| 25 | 23888844 |
| 26 | 36924656 |
| 27 | 56659296 |
| 28 | 86341664 |
| 29 | 130710104 |
| 30 | 196640576 |
| 31 | 294059872 |
| 32 | 437232746 |
| 33 | 646561792 |