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 | 18 |
| 1 | 649 |
| 2 | 23382 |
| 3 | 842401 |
| 4 | 30349818 |
| 5 | 1093435849 |
| 6 | 39394040382 |
| 7 | 1419278889601 |
| 8 | 51133434066018 |
| 9 | 1842222905266249 |
| 10 | 66371158023650982 |
| 11 | 2391203911756701601 |
| 12 | 86149711981264908618 |
| 13 | 3103780835237293411849 |
| 14 | 111822259780523827735182 |
| 15 | 4028705132934095091878401 |