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 | 36 |
| 2 | 504 |
| 3 | 5178 |
| 4 | 47640 |
| 5 | 412740 |
| 6 | 3440052 |
| 7 | 27906474 |
| 8 | 221913216 |
| 9 | 1737860310 |
| 10 | 13445785116 |
| 11 | 103012659468 |
| 12 | 782824552488 |
| 13 | 5908380409134 |
| 14 | 44334271544616 |
| 15 | 330997648937706 |
| 16 | 2460394469263680 |
| 17 | 18218335277707956 |
| 18 | 134439600276305244 |