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 | 6 |
| 2 | 66 |
| 3 | 666 |
| 4 | 6670 |
| 5 | 66066 |
| 6 | 600060 |
| 7 | 67007676 |
| 8 | 670677000 |
| 9 | 66067760760 |
| 10 | 76666077676 |
| 11 | 76670776666 |
| 12 | 660067006660776 |
| 13 | 7600067000007076 |
| 14 | 6700677067067607000 |
| 15 | 60660060606000770770776700 |
| 16 | 776600760606070666600067770 |
| 17 | 7766770606766667760666707766 |