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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 1 |
| 5 | 17 |
| 6 | 1 |
| 7 | 45 |
| 8 | 13 |
| 9 | 125 |
| 10 | 1 |
| 11 | 453 |
| 12 | 1 |
| 13 | 1265 |
| 14 | 133 |
| 15 | 4221 |
| 16 | 1 |
| 17 | 14201 |
| 18 | 1 |
| 19 | 46405 |
| 20 | 1273 |
| 21 | 155501 |
| 22 | 1 |
| 23 | 531789 |
| 24 | 121 |
| 25 | 1792809 |
| 26 | 13801 |
| 27 | 6126333 |
| 28 | 1 |
| 29 | 21032793 |
| 30 | 1 |
| 31 | 72121853 |
| 32 | 155509 |
| 33 | 248396797 |
| 34 | 1381 |
| 35 | 857944149 |
| 36 | 1 |
| 37 | 2964896881 |
| 38 | 1792817 |
| 39 | 10269600621 |
| 40 | 1 |
| 41 | 35628546989 |
| 42 | 1 |