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 | 144 |
| 2 | 3312 |
| 3 | 63792 |
| 4 | 1125360 |
| 5 | 18852912 |
| 6 | 305242992 |
| 7 | 4823705520 |
| 8 | 74858700528 |
| 9 | 1145496747312 |
| 10 | 17332683832944 |
| 11 | 259866681636528 |
| 12 | 3866483993274864 |
| 13 | 57157824214772784 |
| 14 | 840294622720295280 |
| 15 | 12294351113071353264 |