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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 14 |
| 6 | 42 |
| 7 | 118 |
| 8 | 314 |
| 9 | 806 |
| 10 | 2010 |
| 11 | 4902 |
| 12 | 11738 |
| 13 | 27686 |
| 14 | 64474 |
| 15 | 148518 |
| 16 | 338906 |
| 17 | 767014 |
| 18 | 1723354 |
| 19 | 3847206 |
| 20 | 8539098 |
| 21 | 18854950 |
| 22 | 41438170 |
| 23 | 90682406 |
| 24 | 197675994 |
| 25 | 429372454 |
| 26 | 929582042 |
| 27 | 2006430758 |
| 28 | 4318579674 |
| 29 | 9270965286 |
| 30 | 19854281690 |
| 31 | 42422744102 |
| 32 | 90452806618 |
| 33 | 192478164006 |