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 | 5 |
| 2 | 12 |
| 3 | 427 |
| 4 | 10924032 |
| 5 | 16125952 |
| 6 | 22017387 |
| 7 | 24376323 |
| 8 | 32501857 |
| 9 | 33288097 |
| 10 | 3757637632 |
| 11 | 6241076643 |
| 12 | 8522760577 |
| 13 | 45091651584 |
| 14 | 66563866624 |
| 15 | 86692869921 |
| 16 | 137421905953 |
| 17 | 137437511683 |
| 18 | 727145809044307968 |
| 19 | 1152771972099211264 |
| 20 | 845044701535107443245558061611352064 |