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 | 60 |
| 3 | 515 |
| 4 | 3800 |
| 5 | 25749 |
| 6 | 165070 |
| 7 | 1018135 |
| 8 | 6103350 |
| 9 | 35797125 |
| 10 | 206363748 |
| 11 | 1173148275 |
| 12 | 6592732750 |
| 13 | 36692520865 |
| 14 | 202542849720 |
| 15 | 1110149980567 |
| 16 | 6047465281420 |
| 17 | 32765782091385 |
| 18 | 176683116394850 |
| 19 | 948690479365355 |
| 20 | 5074595254876020 |
| 21 | 27051397095965605 |
| 22 | 143757461666945890 |