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 | 1 |
| 2 | 10 |
| 3 | 101 |
| 4 | 187 |
| 5 | 149 |
| 6 | 1021 |
| 7 | 33016 |
| 8 | 6845 |
| 9 | 37447 |
| 10 | 343471 |
| 11 | 217843 |
| 12 | 269387 |
| 13 | 652735 |
| 14 | 658741 |
| 15 | 84404851 |
| 16 | 594869 |
| 17 | 99801 |
| 18 | 19571431 |
| 19 | 845870737 |
| 20 | 6799977641 |
| 21 | 826494610001 |
| 22 | 4703352797483 |
| 23 | 5311077568679 |
| 24 | 5955647363593 |
| 25 | 5974287995603 |
| 26 | 2396798638405 |
| 27 | 2403189712237 |