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 | 0 |
| 1 | 60 |
| 2 | 450 |
| 3 | 1790 |
| 4 | 5195 |
| 5 | 12419 |
| 6 | 25999 |
| 7 | 49399 |
| 8 | 87154 |
| 9 | 145014 |
| 10 | 230088 |
| 11 | 350988 |
| 12 | 517973 |
| 13 | 743093 |
| 14 | 1040333 |
| 15 | 1425757 |
| 16 | 1917652 |
| 17 | 2536672 |
| 18 | 3305982 |
| 19 | 4251402 |
| 20 | 5401551 |
| 21 | 6787991 |
| 22 | 8445371 |
| 23 | 10411571 |
| 24 | 12727846 |
| 25 | 15438970 |
| 26 | 18593380 |
| 27 | 22243320 |
| 28 | 26444985 |
| 29 | 31258665 |