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 | 0 |
| 2 | 3 |
| 3 | 69 |
| 4 | 390 |
| 5 | 1314 |
| 6 | 3441 |
| 7 | 7503 |
| 8 | 14388 |
| 9 | 25692 |
| 10 | 42471 |
| 11 | 66417 |
| 12 | 100194 |
| 13 | 145206 |
| 14 | 204429 |
| 15 | 280971 |
| 16 | 377400 |
| 17 | 496608 |
| 18 | 642891 |
| 19 | 821925 |
| 20 | 1034742 |
| 21 | 1288602 |
| 22 | 1587009 |
| 23 | 1933695 |
| 24 | 2339100 |
| 25 | 2802804 |
| 26 | 3334983 |
| 27 | 3942585 |
| 28 | 4627002 |
| 29 | 5404542 |
| 30 | 6278661 |
| 31 | 7252539 |
| 32 | 8332968 |
| 33 | 9537456 |