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 | 33 |
| 3 | 366 |
| 4 | 2050 |
| 5 | 7815 |
| 6 | 23331 |
| 7 | 58828 |
| 8 | 131076 |
| 9 | 265725 |
| 10 | 500005 |
| 11 | 885786 |
| 12 | 1492998 |
| 13 | 2413411 |
| 14 | 3764775 |
| 15 | 5695320 |
| 16 | 8388616 |
| 17 | 12068793 |
| 18 | 17006121 |
| 19 | 23522950 |
| 20 | 32000010 |
| 21 | 42883071 |
| 22 | 56689963 |
| 23 | 74017956 |
| 24 | 95551500 |
| 25 | 122070325 |
| 26 | 154457901 |
| 27 | 193710258 |
| 28 | 240945166 |
| 29 | 297411675 |