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) |
|---|---|
| 0 | 524287 |
| 1 | 267912191 |
| 2 | 4042816543 |
| 3 | 13744315618 |
| 4 | 22906842477 |
| 5 | 40376162084 |
| 6 | 62439401835 |
| 7 | 75097753016 |
| 8 | 148683059317 |
| 9 | 290355594575 |
| 10 | 498390060837 |
| 11 | 652145353600 |
| 12 | 1276493816718 |
| 13 | 1985213666020 |
| 14 | 2887709403613 |