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 | 17 |
| 2 | 41 |
| 3 | 180078317 |
| 4 | 1278189947 |
| 5 | 1761702947 |
| 6 | 1829187287 |
| 7 | 5862143447 |
| 8 | 6369321857 |
| 9 | 7226006861 |
| 10 | 8776320587 |
| 11 | 10102729577 |
| 12 | 11085833111 |
| 13 | 12412643261 |
| 14 | 50626299797 |
| 15 | 53039299211 |
| 16 | 72355485857 |
| 17 | 74621287901 |
| 18 | 76233413141 |
| 19 | 81948881447 |
| 20 | 115826556611 |
| 21 | 129077263697 |