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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 9 |
| 5 | 39 |
| 6 | 120 |
| 7 | 300 |
| 8 | 645 |
| 9 | 1261 |
| 10 | 2262 |
| 11 | 3825 |
| 12 | 6160 |
| 13 | 9471 |
| 14 | 14178 |
| 15 | 20376 |
| 16 | 28965 |
| 17 | 39600 |
| 18 | 54066 |
| 19 | 71145 |
| 20 | 94248 |
| 21 | 120140 |
| 22 | 155310 |
| 23 | 193116 |
| 24 | 244560 |
| 25 | 297819 |
| 26 | 370860 |
| 27 | 443710 |
| 28 | 544554 |
| 29 | 641655 |
| 30 | 778458 |
| 31 | 904800 |
| 32 | 1085445 |
| 33 | 1248762 |
| 34 | 1483308 |
| 35 | 1688052 |
| 36 | 1991515 |
| 37 | 2244375 |
| 38 | 2626380 |