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) |
|---|---|
| 3 | 35 |
| 4 | 1225 |
| 5 | 24990 |
| 6 | 426650 |
| 7 | 6779185 |
| 8 | 104394675 |
| 9 | 1585021340 |
| 10 | 23909487700 |
| 11 | 359582866335 |
| 12 | 5400330984125 |
| 13 | 81051093085690 |
| 14 | 1216089331752750 |
| 15 | 18243600636165485 |
| 16 | 273669834496409575 |
| 17 | 4105158293128058040 |
| 18 | 61578149829707541800 |
| 19 | 923677675484159636635 |