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 | 5 |
| 3 | 21 |
| 4 | 54 |
| 5 | 110 |
| 6 | 195 |
| 7 | 315 |
| 8 | 476 |
| 9 | 684 |
| 10 | 945 |
| 11 | 1265 |
| 12 | 1650 |
| 13 | 2106 |
| 14 | 2639 |
| 15 | 3255 |
| 16 | 3960 |
| 17 | 4760 |
| 18 | 5661 |
| 19 | 6669 |
| 20 | 7790 |
| 21 | 9030 |
| 22 | 10395 |
| 23 | 11891 |
| 24 | 13524 |
| 25 | 15300 |
| 26 | 17225 |
| 27 | 19305 |
| 28 | 21546 |
| 29 | 23954 |
| 30 | 26535 |
| 31 | 29295 |
| 32 | 32240 |
| 33 | 35376 |
| 34 | 38709 |
| 35 | 42245 |
| 36 | 45990 |
| 37 | 49950 |
| 38 | 54131 |
| 39 | 58539 |