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 | 2 |
| 2 | 11 |
| 3 | 99 |
| 4 | 2638 |
| 5 | 133118 |
| 6 | 15985259 |
| 7 | 4257307148 |
| 8 | 2506410920603 |
| 9 | 3330699748741870 |
| 10 | 9838180083513076754 |
| 11 | 65038588812750477539631 |
| 12 | 960673982564908731679446423 |
| 13 | 31695946605234699442469207411170 |