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 | 10 |
| 6 | 30 |
| 7 | 102 |
| 8 | 204 |
| 9 | 444 |
| 10 | 740 |
| 11 | 1300 |
| 12 | 1950 |
| 13 | 3030 |
| 14 | 4242 |
| 15 | 6090 |
| 16 | 8120 |
| 17 | 11032 |
| 18 | 14184 |
| 19 | 18504 |
| 20 | 23130 |
| 21 | 29250 |
| 22 | 35750 |
| 23 | 44110 |
| 24 | 52932 |
| 25 | 64020 |
| 26 | 75660 |
| 27 | 90012 |
| 28 | 105014 |
| 29 | 123214 |
| 30 | 142170 |
| 31 | 164850 |
| 32 | 188400 |
| 33 | 216240 |
| 34 | 245072 |
| 35 | 278800 |
| 36 | 313650 |
| 37 | 354042 |
| 38 | 395694 |
| 39 | 443574 |
| 40 | 492860 |
| 41 | 549100 |
| 42 | 606900 |
| 43 | 672420 |
| 44 | 739662 |