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 | 1 |
| 3 | 6 |
| 4 | 26 |
| 5 | 106 |
| 6 | 431 |
| 7 | 1757 |
| 8 | 7168 |
| 9 | 29244 |
| 10 | 119305 |
| 11 | 486716 |
| 12 | 1985603 |
| 13 | 8100456 |
| 14 | 33046585 |
| 15 | 134816705 |
| 16 | 549997641 |
| 17 | 2243767969 |
| 18 | 9153665985 |
| 19 | 37343255690 |
| 20 | 152345382480 |
| 21 | 621507555626 |
| 22 | 2535499503900 |
| 23 | 10343812679475 |
| 24 | 42198572937400 |