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) |
|---|---|
| 2 | 450 |
| 3 | 4480 |
| 4 | 51842 |
| 5 | 631750 |
| 6 | 7840800 |
| 7 | 97964230 |
| 8 | 1227006722 |
| 9 | 15382568320 |
| 10 | 192913661250 |
| 11 | 2419663276870 |
| 12 | 30350713098272 |
| 13 | 380707349218630 |
| 14 | 4775477743210050 |
| 15 | 59902315898992000 |
| 16 | 751399441414986242 |
| 17 | 9425367683335685830 |
| 18 | 118229486214797575200 |
| 19 | 1483041587095202467270 |
| 20 | 18602909221707721745282 |
| 21 | 233350323785397856885120 |