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 | 5 |
| 3 | 13 |
| 4 | 36 |
| 5 | 102 |
| 6 | 313 |
| 7 | 994 |
| 8 | 3318 |
| 9 | 11536 |
| 10 | 41748 |
| 11 | 156735 |
| 12 | 609973 |
| 13 | 2456235 |
| 14 | 10224216 |
| 15 | 43946245 |
| 16 | 194866898 |
| 17 | 890575047 |
| 18 | 4190997666 |
| 19 | 20289434813 |
| 20 | 100952490046 |
| 21 | 515758568587 |
| 22 | 2703023502100 |
| 23 | 14518677321040 |
| 24 | 79852871813827 |
| 25 | 449333028779385 |
| 26 | 2584677513933282 |