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 | 0 |
| 4 | 2 |
| 5 | 7 |
| 6 | 18 |
| 7 | 42 |
| 8 | 84 |
| 9 | 153 |
| 10 | 264 |
| 11 | 429 |
| 12 | 666 |
| 13 | 1001 |
| 14 | 1456 |
| 15 | 2061 |
| 16 | 2856 |
| 17 | 3876 |
| 18 | 5166 |
| 19 | 6783 |
| 20 | 8778 |
| 21 | 11214 |
| 22 | 14168 |
| 23 | 17710 |
| 24 | 21924 |
| 25 | 26910 |
| 26 | 32760 |
| 27 | 39582 |
| 28 | 47502 |
| 29 | 56637 |
| 30 | 67122 |
| 31 | 79112 |
| 32 | 92752 |
| 33 | 108207 |
| 34 | 125664 |
| 35 | 145299 |
| 36 | 167310 |
| 37 | 191919 |
| 38 | 219336 |
| 39 | 249795 |
| 40 | 283556 |