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) |
|---|---|
| 5 | 1 |
| 6 | 11 |
| 7 | 76 |
| 8 | 376 |
| 9 | 1496 |
| 10 | 5032 |
| 11 | 14872 |
| 12 | 39572 |
| 13 | 96607 |
| 14 | 219373 |
| 15 | 468440 |
| 16 | 948640 |
| 17 | 1834560 |
| 18 | 3407040 |
| 19 | 6104736 |
| 20 | 10594728 |
| 21 | 17868213 |
| 22 | 29367063 |
| 23 | 47149828 |
| 24 | 74105240 |
| 25 | 114224968 |
| 26 | 172946488 |
| 27 | 257581688 |
| 28 | 377845468 |
| 29 | 546504595 |
| 30 | 780165113 |