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 | 5 |
| 2 | 10 |
| 3 | 26 |
| 4 | 79 |
| 5 | 212 |
| 6 | 603 |
| 7 | 1841 |
| 8 | 5663 |
| 9 | 17379 |
| 10 | 53565 |
| 11 | 166423 |
| 12 | 518704 |
| 13 | 1616890 |
| 14 | 5041039 |
| 15 | 15729206 |
| 16 | 49104949 |
| 17 | 153322792 |
| 18 | 478742546 |
| 19 | 1494954997 |
| 20 | 4668557664 |
| 21 | 14579783689 |
| 22 | 45532767521 |
| 23 | 142200230227 |
| 24 | 444098944427 |
| 25 | 1386951488437 |
| 26 | 4331554392329 |