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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 12 |
| 5 | 37 |
| 6 | 118 |
| 7 | 407 |
| 8 | 1368 |
| 9 | 4617 |
| 10 | 15642 |
| 11 | 52891 |
| 12 | 178916 |
| 13 | 605325 |
| 14 | 2047726 |
| 15 | 6927407 |
| 16 | 23435376 |
| 17 | 79281105 |
| 18 | 268206130 |
| 19 | 907335091 |
| 20 | 3069492092 |
| 21 | 10384017717 |
| 22 | 35128880742 |
| 23 | 118840150983 |
| 24 | 402033352264 |
| 25 | 1360069089113 |
| 26 | 4601080768074 |