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 | 1 |
| 1 | 1 |
| 2 | 11 |
| 3 | 176 |
| 4 | 3311 |
| 5 | 68211 |
| 6 | 1489488 |
| 7 | 33870540 |
| 8 | 793542167 |
| 9 | 19022318084 |
| 10 | 464333035881 |
| 11 | 11502251937176 |
| 12 | 288417894029200 |
| 13 | 7306488667126803 |
| 14 | 186719056586568660 |
| 15 | 4807757550367267056 |
| 16 | 124609430032127192295 |
| 17 | 3248403420844673986345 |