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 | 0 |
| 2 | 1 |
| 3 | 10 |
| 4 | 100 |
| 5 | 1000 |
| 6 | 10000 |
| 7 | 100000 |
| 8 | 1000000 |
| 9 | 4152760 |
| 10 | 9845261 |
| 11 | 10000000 |
| 12 | 10253497 |
| 13 | 10357426 |
| 14 | 10384796 |
| 15 | 10972365 |
| 16 | 12546973 |
| 17 | 13247805 |
| 18 | 15942760 |
| 19 | 16537428 |
| 20 | 17534690 |
| 21 | 18326705 |
| 22 | 18392576 |
| 23 | 18492763 |
| 24 | 18659437 |
| 25 | 19728603 |
| 26 | 21648705 |
| 27 | 23956714 |
| 28 | 24130568 |
| 29 | 24351980 |
| 30 | 24931756 |
| 31 | 27681350 |