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) |
|---|---|
| 2 | 4 |
| 3 | 6 |
| 4 | 8910 |
| 5 | 12 |
| 6 | 141516 |
| 7 | 18 |
| 8 | 202122 |
| 9 | 2425262728 |
| 10 | 30 |
| 11 | 3233343536 |
| 12 | 383940 |
| 13 | 42 |
| 14 | 444546 |
| 15 | 4849505152 |
| 16 | 5455565758 |
| 17 | 60 |
| 18 | 6263646566 |
| 19 | 686970 |
| 20 | 72 |
| 21 | 7475767778 |
| 22 | 808182 |
| 23 | 8485868788 |
| 24 | 90919293949596 |
| 25 | 9899100 |
| 26 | 102 |
| 27 | 104105106 |
| 28 | 108 |
| 29 | 110111112 |