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) |
|---|---|
| 4 | 36 |
| 5 | 820 |
| 6 | 7645 |
| 7 | 44473 |
| 8 | 191620 |
| 9 | 669188 |
| 10 | 1999370 |
| 11 | 5293970 |
| 12 | 12728936 |
| 13 | 28285400 |
| 14 | 58856655 |
| 15 | 115842675 |
| 16 | 217378200 |
| 17 | 391367064 |
| 18 | 679524340 |
| 19 | 1142659012 |
| 20 | 1867463260 |
| 21 | 2975110060 |
| 22 | 4631998657 |
| 23 | 7063027565 |
| 24 | 10567817084 |
| 25 | 15540347900 |
| 26 | 22492529150 |
| 27 | 32082258390 |
| 28 | 45146587200 |