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 | 3 |
| 1 | 28 |
| 2 | 146 |
| 3 | 420 |
| 4 | 1260 |
| 5 | 2408 |
| 6 | 5460 |
| 7 | 9084 |
| 8 | 17010 |
| 9 | 24420 |
| 10 | 44968 |
| 11 | 57148 |
| 12 | 93912 |
| 13 | 123480 |
| 14 | 187240 |
| 15 | 222768 |
| 16 | 347463 |
| 17 | 391020 |
| 18 | 582540 |
| 19 | 674240 |
| 20 | 923076 |
| 21 | 1026168 |
| 22 | 1506960 |
| 23 | 1575100 |
| 24 | 2143050 |
| 25 | 2391480 |
| 26 | 3164112 |
| 27 | 3300780 |
| 28 | 4604040 |
| 29 | 4617760 |
| 30 | 6191568 |
| 31 | 6564096 |
| 32 | 8270262 |