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 | 20 |
| 5 | 87 |
| 6 | 244 |
| 7 | 545 |
| 8 | 1056 |
| 9 | 1855 |
| 10 | 3032 |
| 11 | 4689 |
| 12 | 6940 |
| 13 | 9911 |
| 14 | 13740 |
| 15 | 18577 |
| 16 | 24584 |
| 17 | 31935 |
| 18 | 40816 |
| 19 | 51425 |
| 20 | 63972 |
| 21 | 78679 |
| 22 | 95780 |
| 23 | 115521 |
| 24 | 138160 |
| 25 | 163967 |
| 26 | 193224 |
| 27 | 226225 |
| 28 | 263276 |
| 29 | 304695 |
| 30 | 350812 |
| 31 | 401969 |
| 32 | 458520 |
| 33 | 520831 |
| 34 | 589280 |
| 35 | 664257 |
| 36 | 746164 |
| 37 | 835415 |
| 38 | 932436 |